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fix migrate_db2fs to only fetch 5 files per query, as we dont want to require enough memory to hold all file in memory

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This commit is contained in:
Ralf Becker 2015-02-16 15:15:54 +00:00
parent 09e6adc04b
commit 42413373b5
2 changed files with 17 additions and 13 deletions
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2
api/src/Vfs/Sqlfs/StreamWrapper.php
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@ -678,7 +678,7 @@ class StreamWrapper implements Vfs\StreamWrapperIface
/**
* due to problems with recursive directory creation, we have our own here
*/
private static function mkdir_recursive($pathname, $mode, $depth=0)
protected static function mkdir_recursive($pathname, $mode, $depth=0)
{
$maxdepth=10;
$depth2propagate = (int)$depth + 1;

28
api/src/Vfs/Sqlfs/Utils.php
View File

@ -37,18 +37,21 @@ class Utils extends StreamWrapper
self::_pdo();
}
$query = 'SELECT fs_id,fs_name,fs_size,fs_content'.
' FROM '.self::TABLE.' WHERE fs_content IS NOT NULL';
$query = 'SELECT fs_id,fs_name,fs_size,fs_content'.
' FROM '.self::TABLE.' WHERE fs_content IS NOT NULL'.
' ORDER BY fs_id LIMIT 5 OFFSET :offset';
$fs_id = $fs_name = $fs_size = $fs_content = null;
$n = 0;
$stmt = self::$pdo->prepare($query);
$stmt->bindColumn(1,$fs_id);
$stmt->bindColumn(2,$fs_name);
$stmt->bindColumn(3,$fs_size);
$stmt->bindColumn(4,$fs_content,\PDO::PARAM_LOB);
$stmt->bindColumn(4,$fs_content,PDO::PARAM_LOB);
$stmt->bindValue(':offset', $n, PDO::PARAM_INT);
if ($stmt->execute())
while ($stmt->execute())
{
$n = 0;
foreach($stmt as $row)
{
// hack to work around a current php bug (http://bugs.php.net/bug.php?id=40913)
@ -86,16 +89,17 @@ class Utils extends StreamWrapper
fclose($content); unset($content);
++$n;
unset($row); // not used, as we access bound variables
}
unset($stmt);
if (!$n) break; // just in case nothing is found, statement will execute just fine
}
unset($row); // not used, as we access bound variables
unset($stmt);
if ($n) // delete all content in DB, if there was some AND no error (exception thrown!)
{
$query = 'UPDATE '.self::TABLE.' SET fs_content=NULL WHERE fs_content IS NOT NULL';
$stmt = self::$pdo->prepare($query);
$stmt->execute();
}
if ($n) // delete all content in DB, if there was some AND no error (exception thrown!)
{
$query = 'UPDATE '.self::TABLE.' SET fs_content=NULL WHERE fs_content IS NOT NULL';
$stmt = self::$pdo->prepare($query);
$stmt->execute();
}
return $n;
}