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https://github.com/pgbackrest/pgbackrest.git
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5ada189a92
A connection to the primary cluster is still required to start/stop the backup and copy files that are not replicated, but the vast majority of files are copied from the standby in order to reduce load on the master.
122 lines
3.6 KiB
Perl
122 lines
3.6 KiB
Perl
####################################################################################################################################
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# ARCHIVE COMMON MODULE
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####################################################################################################################################
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package pgBackRest::ArchiveCommon;
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use strict;
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use warnings FATAL => qw(all);
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use Carp qw(confess);
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use Exporter qw(import);
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our @EXPORT = qw();
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use pgBackRest::DbVersion;
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use pgBackRest::Common::Log;
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####################################################################################################################################
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# lsnNormalize
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#
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# Generates a normalized form from an LSN that can be used for comparison.
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####################################################################################################################################
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sub lsnNormalize
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{
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strLsn,
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) =
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logDebugParam
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(
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__PACKAGE__ . 'lsnFile', \@_,
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{name => 'strLsn', trace => true},
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);
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# Split the LSN into major and minor parts
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my @stryLsnSplit = split('/', $strLsn);
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if (@stryLsnSplit != 2)
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{
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confess &log(ASSERT, "invalid lsn ${strLsn}");
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}
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my $strLsnNormal = uc(sprintf("%08s%08s", $stryLsnSplit[0], $stryLsnSplit[1]));
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'strLsnNormal', value => $strLsnNormal, trace => true}
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);
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}
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push @EXPORT, qw(lsnNormalize);
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####################################################################################################################################
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# lsnFileRange
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#
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# Generates a range of WAL filenames given the start and stop LSN. For pre-9.3 databases, use bSkipFF to exclude the FF that
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# prior versions did not generate.
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####################################################################################################################################
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sub lsnFileRange
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{
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strLsnStart,
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$strLsnStop,
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$strDbVersion,
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) =
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logDebugParam
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(
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__PACKAGE__ . 'lsnFileRange', \@_,
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{name => 'strLsnStart'},
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{name => 'strLsnStop'},
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{name => '$strDbVersion'},
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);
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# Working variables
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my @stryArchive;
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my $iArchiveIdx = 0;
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my $bSkipFF = $strDbVersion < PG_VERSION_93;
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# Iterate through all archive logs between start and stop
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my @stryArchiveSplit = split('/', $strLsnStart);
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my $iStartMajor = hex($stryArchiveSplit[0]);
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my $iStartMinor = hex(substr(sprintf("%08s", $stryArchiveSplit[1]), 0, 2));
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@stryArchiveSplit = split('/', $strLsnStop);
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my $iStopMajor = hex($stryArchiveSplit[0]);
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my $iStopMinor = hex(substr(sprintf("%08s", $stryArchiveSplit[1]), 0, 2));
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$stryArchive[$iArchiveIdx] = uc(sprintf("%08x%08x", $iStartMajor, $iStartMinor));
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$iArchiveIdx += 1;
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while (!($iStartMajor == $iStopMajor && $iStartMinor == $iStopMinor))
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{
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$iStartMinor += 1;
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if ($bSkipFF && $iStartMinor == 255 || !$bSkipFF && $iStartMinor == 256)
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{
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$iStartMajor += 1;
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$iStartMinor = 0;
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}
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$stryArchive[$iArchiveIdx] = uc(sprintf("%08x%08x", $iStartMajor, $iStartMinor));
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$iArchiveIdx += 1;
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}
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'stryWalFileName', value => \@stryArchive}
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);
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}
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push @EXPORT, qw(lsnFileRange);
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1;
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