mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add "SSD" acronym mention for solid state drive mention.

Browse Source
This commit is contained in:
Bruce Momjian 2010-04-13 14:15:25 +00:00
parent 4f57c28da0
commit ea9c103237
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
doc/src/sgml/wal.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.65 2010/03/17 17:12:31 petere Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.66 2010/04/13 14:15:25 momjian Exp $ -->
<chapter id="wal"> <chapter id="wal">
<title>Reliability and the Write-Ahead Log</title> <title>Reliability and the Write-Ahead Log</title>
@ -61,7 +61,7 @@
particularly likely to have write-back caches that will not survive a particularly likely to have write-back caches that will not survive a
power failure, though <acronym>ATAPI-6</> introduced a drive cache power failure, though <acronym>ATAPI-6</> introduced a drive cache
flush command (FLUSH CACHE EXT) that some file systems use, e.g. <acronym>ZFS</>. flush command (FLUSH CACHE EXT) that some file systems use, e.g. <acronym>ZFS</>.
Many solid-state drives also have volatile write-back Many solid-state drives (SSD) also have volatile write-back
caches, and many do not honor cache flush commands by default. caches, and many do not honor cache flush commands by default.
To check write caching on <productname>Linux</> use To check write caching on <productname>Linux</> use
<command>hdparm -I</>; it is enabled if there is a <literal>*</> next <command>hdparm -I</>; it is enabled if there is a <literal>*</> next