mirror of
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Auto-select backup for restore command --type=lsn.
For PITR with --type=lsn, attempt to auto-select the appropriate backup set based on the --target LSN provided. Pick the most recent backup where backup-lsn-stop is less than or equal to the provided LSN.
This commit is contained in:
Reid Thompson
GitHub
parent
08d9e269c6
commit
d8d4132118
@ -17,6 +17,21 @@
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<release date="XXXX-XX-XX" version="2.39dev" title="UNDER DEVELOPMENT">
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<release-core-list>
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<release-feature-list>
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<release-item>
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<commit subject="Refactor target type checking for clarity in restore module."/>
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<commit subject="Auto-select backup for restore command --type=lsn.">
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<github-pull-request id="1706"/>
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</commit>
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<release-item-contributor-list>
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<release-item-contributor id="reid.thompson"/>
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<release-item-reviewer id="stefan.fercot"/>
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<release-item-reviewer id="david.steele"/>
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</release-item-contributor-list>
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<p>Auto-select backup for <cmd>restore</cmd> command <br-option>--type=lsn</br-option>.</p>
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</release-item>
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<release-item>
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<github-issue id="1685"/>
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<github-pull-request id="1691"/>
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@ -2173,7 +2173,7 @@
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<text>
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<p>The restore command automatically defaults to selecting the latest backup from the first repository where backups exist (see <link page="user-guide" section="/quickstart/perform-restore">Quick Start - Restore a Backup</link>). The order in which the repositories are checked is dictated by the <file>pgbackrest.conf</file> (e.g. repo1 will be checked before repo2). To select from a specific repository, the <br-option>{[dash]}-repo</br-option> option can be passed (e.g. <br-option>{[dash]}-repo=1</br-option>). The <br-option>{[dash]}-set</br-option> option can be passed if a backup other than the latest is desired.</p>
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<p>When PITR of <br-option>{[dash]}-type=time</br-option> is specified, then the target time must be specified with the <br-option>{[dash]}-target</br-option> option. If a backup is not specified via the <br-option>{[dash]}-set</br-option> option, then the configured repositories will be checked, in order, for a backup that contains the requested time. If no backup can be found, the latest backup from the first repository containing backups will be used. For other types of PITR, e.g. <id>xid</id>, the <br-option>{[dash]}-set</br-option> option must be provided if the target is prior to the latest backup. See <link page="user-guide" section="/pitr">Point-in-Time Recovery</link> for more details and examples.</p>
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<p>When PITR of <br-option>{[dash]}-type=time</br-option> or <br-option>{[dash]}-type=lsn</br-option> is specified, then the target time or target lsn must be specified with the <br-option>{[dash]}-target</br-option> option. If a backup is not specified via the <br-option>{[dash]}-set</br-option> option, then the configured repositories will be checked, in order, for a backup that contains the requested time or lsn. If no matching backup is found, the latest backup from the first repository containing backups will be used for <br-option>{[dash]}-type=time</br-option> while no backup will be selected for <br-option>{[dash]}-type=lsn</br-option>. For other types of PITR, e.g. <id>xid</id>, the <br-option>{[dash]}-set</br-option> option must be provided if the target is prior to the latest backup. See <link page="user-guide" section="/pitr">Point-in-Time Recovery</link> for more details and examples.</p>
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<p>Replication slots are not included per recommendation of <postgres/>. See <link url="https://www.postgresql.org/docs/current/continuous-archiving.html#BACKUP-LOWLEVEL-BASE-BACKUP-DATA">Backing Up The Data Directory</link> in the <postgres/> documentation for more information.</p>
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</text>
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@ -2229,7 +2229,7 @@
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<summary>Recovery target.</summary>
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<text>
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<p>Defines the recovery target when <br-option>--type</br-option> is <id>lsn</id>, <id>name</id>, <id>xid</id>, or <id>time</id>. If the target is prior to the latest backup and <br-option>--type</br-option> is not <id>time</id>, then use the <br-option>--set</br-option> option to specify the backup set.</p>
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<p>Defines the recovery target when <br-option>--type</br-option> is <id>lsn</id>, <id>name</id>, <id>xid</id>, or <id>time</id>. If the target is prior to the latest backup and <br-option>--type</br-option> is not <id>time</id> or <id>lsn</id>, then use the <br-option>--set</br-option> option to specify the backup set.</p>
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</text>
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<example>2015-01-30 14:15:11 EST</example>
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@ -237,16 +237,23 @@ restoreBackupSet(void)
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repoIdxMax = repoIdxMin;
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}
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// If the set option was not provided by the user but a time to recover was set, then we will need to search for a backup
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// set that satisfies the time condition, else we will use the backup provided
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// If the set option was not provided by the user but a target was set, then we will need to search for a backup set that
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// satisfies the target condition, else we will use the backup provided
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const String *backupSetRequested = NULL;
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const StringId targetType = cfgOptionStrId(cfgOptType);
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time_t targetTime = 0;
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union
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{
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time_t time;
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uint64_t lsn;
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} target = {0};
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if (cfgOptionSource(cfgOptSet) == cfgSourceDefault)
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{
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if (targetType == CFGOPTVAL_TYPE_TIME)
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targetTime = getEpoch(cfgOptionStr(cfgOptTarget));
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target.time = getEpoch(cfgOptionStr(cfgOptTarget));
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else if (targetType == CFGOPTVAL_TYPE_LSN)
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target.lsn = pgLsnFromStr(cfgOptionStr(cfgOptTarget));
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}
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else
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backupSetRequested = cfgOptionStr(cfgOptSet);
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@ -284,14 +291,14 @@ restoreBackupSet(void)
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continue;
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}
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// If a backup set was not specified, then see if a time to recover was requested
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// If a backup set was not specified, then see if a target was requested
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if (backupSetRequested == NULL)
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{
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// Get the latest backup
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InfoBackupData latestBackup = infoBackupData(infoBackup, infoBackupDataTotal(infoBackup) - 1);
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// If the recovery type is time, attempt to determine the backup set
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if (targetType == CFGOPTVAL_TYPE_TIME)
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// If a target was requested, attempt to determine the backup set
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if (targetType == CFGOPTVAL_TYPE_TIME || targetType == CFGOPTVAL_TYPE_LSN)
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{
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bool found = false;
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@ -301,13 +308,25 @@ restoreBackupSet(void)
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// Get the backup data
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InfoBackupData backupData = infoBackupData(infoBackup, keyIdx);
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// If the end of the backup is before the target time, then select this backup
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if (backupData.backupTimestampStop < targetTime)
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// If target is lsn and no backupLsnStop exists, exit this repo and log that backup may be manually selected
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if (targetType == CFGOPTVAL_TYPE_LSN && !backupData.backupLsnStop)
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{
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LOG_WARN_FMT(
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"%s reached backup from prior version missing required LSN info before finding a match -- backup"
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" auto-select has been disabled for this repo\n"
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"HINT: you may specify a backup to restore using the --set option.",
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cfgOptionGroupName(cfgOptGrpRepo, repoIdx));
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break;
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}
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// If the end of the backup is valid for the target, then select this backup
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if ((targetType == CFGOPTVAL_TYPE_TIME && backupData.backupTimestampStop < target.time) ||
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(targetType == CFGOPTVAL_TYPE_LSN && pgLsnFromStr(backupData.backupLsnStop) <= target.lsn))
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{
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found = true;
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result = restoreBackupData(
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backupData.backupLabel, repoIdx, infoPgCipherPass(infoBackupPg(infoBackup)));
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result = restoreBackupData(backupData.backupLabel, repoIdx, infoPgCipherPass(infoBackupPg(infoBackup)));
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break;
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}
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}
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@ -346,10 +365,11 @@ restoreBackupSet(void)
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{
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if (backupSetRequested != NULL)
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THROW_FMT(BackupSetInvalidError, "backup set %s is not valid", strZ(backupSetRequested));
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else if (targetType == CFGOPTVAL_TYPE_TIME)
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else if (targetType == CFGOPTVAL_TYPE_TIME || targetType == CFGOPTVAL_TYPE_LSN)
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{
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THROW_FMT(
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BackupSetInvalidError, "unable to find backup set with stop time less than '%s'",
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BackupSetInvalidError, "unable to find backup set with %s '%s'",
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targetType == CFGOPTVAL_TYPE_LSN ? "lsn less than or equal to" : "stop time less than",
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strZ(cfgOptionDisplay(cfgOptTarget)));
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}
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else
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@ -177,13 +177,15 @@ testRun(void)
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"specific repository, the --repo option can be passed (e.g. --repo=1). The --set\n"
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"option can be passed if a backup other than the latest is desired.\n"
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"\n"
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"When PITR of --type=time is specified, then the target time must be specified\n"
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"with the --target option. If a backup is not specified via the --set option,\n"
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"then the configured repositories will be checked, in order, for a backup that\n"
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"contains the requested time. If no backup can be found, the latest backup from\n"
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"the first repository containing backups will be used. For other types of PITR,\n"
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"e.g. xid, the --set option must be provided if the target is prior to the\n"
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"latest backup. See Point-in-Time Recovery for more details and examples.\n"
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"When PITR of --type=time or --type=lsn is specified, then the target time or\n"
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"target lsn must be specified with the --target option. If a backup is not\n"
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"specified via the --set option, then the configured repositories will be\n"
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"checked, in order, for a backup that contains the requested time or lsn. If no\n"
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"matching backup is found, the latest backup from the first repository\n"
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"containing backups will be used for --type=time while no backup will be\n"
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"selected for --type=lsn. For other types of PITR, e.g. xid, the --set option\n"
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"must be provided if the target is prior to the latest backup. See Point-in-Time\n"
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"Recovery for more details and examples.\n"
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"\n"
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"Replication slots are not included per recommendation of PostgreSQL. See\n"
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"Backing Up The Data Directory in the PostgreSQL documentation for more\n"
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@ -34,6 +34,33 @@ Test data for backup.info
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"\"db-version\":\"9.4\"}\n"
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#define TEST_RESTORE_BACKUP_INFO \
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"[backup:current]\n" \
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"20161219-212741F={\"backrest-format\":5,\"backrest-version\":\"2.04\"," \
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"\"backup-archive-start\":\"00000007000000000000001C\",\"backup-archive-stop\":\"00000007000000000000001C\"," \
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"\"backup-info-repo-size\":3159776,\"backup-info-repo-size-delta\":3159776,\"backup-info-size\":26897030," \
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"\"backup-info-size-delta\":26897030,\"backup-lsn-stop\":\"0/1C000101\",\"backup-timestamp-start\":1482182846," \
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"\"backup-timestamp-stop\":1482182861,\"backup-type\":\"full\",\"db-id\":1,\"option-archive-check\":true," \
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"\"option-archive-copy\":false,\"option-backup-standby\":false,\"option-checksum-page\":false,\"option-compress\":true," \
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"\"option-hardlink\":false,\"option-online\":true}\n" \
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"20161219-212741F_20161219-212803D={\"backrest-format\":5,\"backrest-version\":\"2.04\"," \
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"\"backup-archive-start\":\"00000008000000000000001E\",\"backup-archive-stop\":\"00000008000000000000001E\"," \
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"\"backup-info-repo-size\":3159811,\"backup-info-repo-size-delta\":15765,\"backup-info-size\":26897030," \
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"\"backup-info-size-delta\":163866,\"backup-lsn-stop\":\"0/1E000101\",\"backup-prior\":\"20161219-212741F\"," \
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"\"backup-reference\":[\"20161219-212741F\"],\"backup-timestamp-start\":1482182877,\"backup-timestamp-stop\":1482182883," \
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"\"backup-type\":\"diff\",\"db-id\":1,\"option-archive-check\":true,\"option-archive-copy\":false," \
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"\"option-backup-standby\":false,\"option-checksum-page\":false,\"option-compress\":true,\"option-hardlink\":false," \
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"\"option-online\":true}\n" \
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"20161219-212741F_20161219-212918I={\"backrest-format\":5,\"backrest-version\":\"2.04\"," \
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"\"backup-archive-start\":null,\"backup-archive-stop\":null," \
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"\"backup-info-repo-size\":3159811,\"backup-info-repo-size-delta\":15765,\"backup-info-size\":26897030," \
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"\"backup-lsn-stop\":\"0/1E000105\",\"backup-info-size-delta\":163866,\"backup-prior\":\"20161219-212741F\"," \
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"\"backup-reference\":[\"20161219-212741F\",\"20161219-212741F_20161219-212803D\"],\"backup-timestamp-start\":1482182884," \
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"\"backup-timestamp-stop\":1482182985,\"backup-type\":\"incr\",\"db-id\":1,\"option-archive-check\":true," \
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"\"option-archive-copy\":false,\"option-backup-standby\":false,\"option-checksum-page\":false,\"option-compress\":true," \
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"\"option-hardlink\":false,\"option-online\":true}\n"
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// To verify handling of missing backup-lsn-stop for --type=lsn --target=<lsn> backup
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#define TEST_RESTORE_BACKUP_INFO1 \
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"[backup:current]\n" \
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"20161219-212741F={\"backrest-format\":5,\"backrest-version\":\"2.04\"," \
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"\"backup-archive-start\":\"00000007000000000000001C\",\"backup-archive-stop\":\"00000007000000000000001C\"," \
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@ -45,18 +72,19 @@ Test data for backup.info
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"20161219-212741F_20161219-212803D={\"backrest-format\":5,\"backrest-version\":\"2.04\"," \
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"\"backup-archive-start\":\"00000008000000000000001E\",\"backup-archive-stop\":\"00000008000000000000001E\"," \
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"\"backup-info-repo-size\":3159811,\"backup-info-repo-size-delta\":15765,\"backup-info-size\":26897030," \
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"\"backup-info-size-delta\":163866,\"backup-prior\":\"20161219-212741F\",\"backup-reference\":[\"20161219-212741F\"]," \
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"\"backup-timestamp-start\":1482182877,\"backup-timestamp-stop\":1482182883,\"backup-type\":\"diff\",\"db-id\":1," \
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"\"option-archive-check\":true,\"option-archive-copy\":false,\"option-backup-standby\":false," \
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"\"option-checksum-page\":false,\"option-compress\":true,\"option-hardlink\":false,\"option-online\":true}\n" \
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"\"backup-info-size-delta\":163866,\"backup-lsn-stop\":\"0/1E000101\",\"backup-prior\":\"20161219-212741F\"," \
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"\"backup-reference\":[\"20161219-212741F\"],\"backup-timestamp-start\":1482182877,\"backup-timestamp-stop\":1482182883," \
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"\"backup-type\":\"diff\",\"db-id\":1,\"option-archive-check\":true,\"option-archive-copy\":false," \
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"\"option-backup-standby\":false,\"option-checksum-page\":false,\"option-compress\":true,\"option-hardlink\":false," \
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"\"option-online\":true}\n" \
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"20161219-212741F_20161219-212918I={\"backrest-format\":5,\"backrest-version\":\"2.04\"," \
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"\"backup-archive-start\":null,\"backup-archive-stop\":null," \
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"\"backup-info-repo-size\":3159811,\"backup-info-repo-size-delta\":15765,\"backup-info-size\":26897030," \
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"\"backup-info-size-delta\":163866,\"backup-prior\":\"20161219-212741F\",\"backup-reference\":[\"20161219-212741F\"," \
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"\"20161219-212741F_20161219-212803D\"]," \
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"\"backup-timestamp-start\":1482182884,\"backup-timestamp-stop\":1482182985,\"backup-type\":\"incr\",\"db-id\":1," \
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"\"option-archive-check\":true,\"option-archive-copy\":false,\"option-backup-standby\":false," \
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"\"option-checksum-page\":false,\"option-compress\":true,\"option-hardlink\":false,\"option-online\":true}\n"
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"\"backup-lsn-stop\":\"0/1E000105\",\"backup-info-size-delta\":163866,\"backup-prior\":\"20161219-212741F\"," \
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"\"backup-reference\":[\"20161219-212741F\",\"20161219-212741F_20161219-212803D\"],\"backup-timestamp-start\":1482182884," \
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"\"backup-timestamp-stop\":1482182985,\"backup-type\":\"incr\",\"db-id\":1,\"option-archive-check\":true," \
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"\"option-archive-copy\":false,\"option-backup-standby\":false,\"option-checksum-page\":false,\"option-compress\":true," \
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"\"option-hardlink\":false,\"option-online\":true}\n"
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/***********************************************************************************************************************************
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Test restores to be sure they match the manifest
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@ -484,6 +512,108 @@ testRun(void)
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TEST_RESULT_LOG(
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"P00 WARN: repo1: [BackupSetInvalidError] no backup sets to restore\n"
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"P00 WARN: repo2: [BackupSetInvalidError] no backup sets to restore");
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// -------------------------------------------------------------------------------------------------------------------------
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TEST_TITLE("target lsn");
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// Match oldest backup on repo 2
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argList = strLstNew();
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hrnCfgArgRawZ(argList, cfgOptStanza, "test1");
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hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 1, repoPath2);
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hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 2, repoPath);
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hrnCfgArgKeyRaw(argList, cfgOptPgPath, 1, pgPath);
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hrnCfgArgRawZ(argList, cfgOptType, "lsn");
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hrnCfgArgRawZ(argList, cfgOptTarget, "0/1C000101");
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HRN_CFG_LOAD(cfgCmdRestore, argList);
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// Write out backup.info with no current backups to repo1, with current backups to repo2
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HRN_INFO_PUT(storageRepoIdxWrite(0), INFO_BACKUP_PATH_FILE, TEST_RESTORE_BACKUP_INFO_DB);
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HRN_INFO_PUT(storageRepoIdxWrite(1), INFO_BACKUP_PATH_FILE, TEST_RESTORE_BACKUP_INFO "\n" TEST_RESTORE_BACKUP_INFO_DB);
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TEST_ASSIGN(backupData, restoreBackupSet(), "get backup set for lsn 0/1C000101");
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TEST_RESULT_STR_Z(backupData.backupSet, "20161219-212741F", "backup set found");
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TEST_RESULT_UINT(backupData.repoIdx, 1, "backup set found, repo2");
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TEST_RESULT_LOG("P00 WARN: repo1: [BackupSetInvalidError] no backup sets to restore");
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// Switch repo paths and target lsn to match newer backup on repo1
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argList = strLstNew();
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hrnCfgArgRawZ(argList, cfgOptStanza, "test1");
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hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 1, repoPath);
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hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 2, repoPath2);
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hrnCfgArgKeyRaw(argList, cfgOptPgPath, 1, pgPath);
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hrnCfgArgRawZ(argList, cfgOptType, "lsn");
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hrnCfgArgRawZ(argList, cfgOptTarget, "0/1E000105");
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HRN_CFG_LOAD(cfgCmdRestore, argList);
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TEST_ASSIGN(backupData, restoreBackupSet(), "get backup set for lsn 0/1E000105");
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TEST_RESULT_STR_Z(backupData.backupSet, "20161219-212741F_20161219-212918I", "backup set found");
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TEST_RESULT_UINT(backupData.repoIdx, 0, "backup set found, repo1");
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// Log warning if missing backup-lsn-stop is found before finding a match
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// Missing backup-lsn-stop in repo1, no backups in repo2, no qualifying auto-selectable backup in either repo
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argList = strLstNew();
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hrnCfgArgRawZ(argList, cfgOptStanza, "test1");
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hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 1, repoPath);
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hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 2, repoPath2);
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hrnCfgArgKeyRaw(argList, cfgOptPgPath, 1, pgPath);
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hrnCfgArgRawZ(argList, cfgOptType, "lsn");
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hrnCfgArgRawZ(argList, cfgOptTarget, "0/1C000101");
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// Re-write repo information with set missing backup-lsn-stop
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HRN_INFO_PUT(storageRepoIdxWrite(0), INFO_BACKUP_PATH_FILE, TEST_RESTORE_BACKUP_INFO1 "\n" TEST_RESTORE_BACKUP_INFO_DB);
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HRN_CFG_LOAD(cfgCmdRestore, argList);
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TEST_ERROR(
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restoreBackupSet(), BackupSetInvalidError, "unable to find backup set with lsn less than or equal to '0/1C000101'");
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TEST_RESULT_LOG(
|
||||
"P00 WARN: repo1 reached backup from prior version missing required LSN info before finding a match -- backup"
|
||||
" auto-select has been disabled for this repo\n"
|
||||
" HINT: you may specify a backup to restore using the --set option.\n"
|
||||
"P00 WARN: repo2: [BackupSetInvalidError] no backup sets to restore");
|
||||
|
||||
// Log warning if missing backup-lsn-stop is found before finding a match
|
||||
// Missing backup-lsn-stop in repo1, qualifying auto-selectable backup set in repo2
|
||||
argList = strLstNew();
|
||||
hrnCfgArgRawZ(argList, cfgOptStanza, "test1");
|
||||
hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 1, repoPath);
|
||||
hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 2, repoPath2);
|
||||
hrnCfgArgKeyRaw(argList, cfgOptPgPath, 1, pgPath);
|
||||
hrnCfgArgRawZ(argList, cfgOptType, "lsn");
|
||||
hrnCfgArgRawZ(argList, cfgOptTarget, "0/1C000102");
|
||||
|
||||
// Write repo2 information with data required to find backup
|
||||
HRN_INFO_PUT(storageRepoIdxWrite(1), INFO_BACKUP_PATH_FILE, TEST_RESTORE_BACKUP_INFO "\n" TEST_RESTORE_BACKUP_INFO_DB);
|
||||
|
||||
HRN_CFG_LOAD(cfgCmdRestore, argList);
|
||||
|
||||
TEST_ASSIGN(backupData, restoreBackupSet(), "get backup set for lsn 0/1C000102");
|
||||
TEST_RESULT_STR_Z(backupData.backupSet, "20161219-212741F", "backup set found");
|
||||
TEST_RESULT_UINT(backupData.repoIdx, 1, "backup set found, repo2");
|
||||
TEST_RESULT_LOG(
|
||||
"P00 WARN: repo1 reached backup from prior version missing required LSN info before finding a match -- backup"
|
||||
" auto-select has been disabled for this repo\n"
|
||||
" HINT: you may specify a backup to restore using the --set option.");
|
||||
|
||||
// No backups to search for qualifying backup set
|
||||
argList = strLstNew();
|
||||
hrnCfgArgRawZ(argList, cfgOptStanza, "test1");
|
||||
hrnCfgArgKeyRaw(argList, cfgOptRepoPath, 2, repoPath);
|
||||
hrnCfgArgKeyRaw(argList, cfgOptPgPath, 1, pgPath);
|
||||
hrnCfgArgRawZ(argList, cfgOptType, "lsn");
|
||||
hrnCfgArgRawZ(argList, cfgOptTarget, "0/1A000102");
|
||||
|
||||
// Write repo info with no current backups
|
||||
HRN_INFO_PUT(storageRepoIdxWrite(0), INFO_BACKUP_PATH_FILE, TEST_RESTORE_BACKUP_INFO_DB);
|
||||
|
||||
HRN_CFG_LOAD(cfgCmdRestore, argList);
|
||||
|
||||
TEST_ERROR(
|
||||
restoreBackupSet(), BackupSetInvalidError, "unable to find backup set with lsn less than or equal to '0/1A000102'");
|
||||
TEST_RESULT_LOG(
|
||||
"P00 WARN: repo2: [BackupSetInvalidError] no backup sets to restore");
|
||||
}
|
||||
|
||||
// *****************************************************************************************************************************
|
||||
|
||||
Loading…
Reference in New Issue
Block a user