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| 1 | +<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.66 2010/04/13 14:15:25 momjian Exp $ --> |
2 | 2 |
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3 | 3 | <chapter id="wal"> |
4 | 4 | <title>Reliability and the Write-Ahead Log</title> |
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61 | 61 | particularly likely to have write-back caches that will not survive a |
62 | 62 | power failure, though <acronym>ATAPI-6</> introduced a drive cache |
63 | 63 | flush command (FLUSH CACHE EXT) that some file systems use, e.g. <acronym>ZFS</>. |
64 | | - Many solid-state drives also have volatile write-back |
| 64 | + Many solid-state drives(SSD)also have volatile write-back |
65 | 65 | caches, and many do not honor cache flush commands by default. |
66 | 66 | To check write caching on <productname>Linux</> use |
67 | 67 | <command>hdparm -I</>; it is enabled if there is a <literal>*</> next |
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