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read.2: Minor fixes 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-05-11 11:39:38 +02:00
parent 403b78f89e
commit eee5da1663
1 changed files with 10 additions and 6 deletions
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@ -177,12 +177,16 @@ On NFS filesystems, reading small amounts of data will update the
timestamp only the first time, subsequent calls may not do so.
This is caused
by client side attribute caching, because most if not all NFS clients
leave st_atime (last file access time)
updates to the server and client side reads satisfied from the
client's cache will not cause st_atime updates on the server as there are no
server side reads.
UNIX semantics can be obtained by disabling client
side attribute caching, but in most situations this will substantially
leave
.I st_atime
(last file access time)
updates to the server, and client side reads satisfied from the
client's cache will not cause
.I st_atime
updates on the server as there are no
server-side reads.
UNIX semantics can be obtained by disabling client-side attribute caching,
but in most situations this will substantially
increase server load and decrease performance.
.SH BUGS
According to POSIX.1-2008/SUSv4 Section XSI 2.9.7