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Full Discussion: Drop_caches doesn't work on Solaris but works on RHEL6
Operating Systems Solaris Drop_caches doesn't work on Solaris but works on RHEL6 Post 302923951 by jlliagre on Wednesday 5th of November 2014 12:35:49 PM
Old 11-05-2014
Quote:
Originally Posted by achenle
You can also drop non-ZFS file system caches for a file system by unmounting that file system.
Yes, but that's more intrusive than using lockfs.
Quote:
I haven't tested that for a ZFS file system, but I think there's a good chance that it will work.
That likely won't work. Unlike with traditional file systems, data can be shared between ZFS file systems belonging to the same pool so the cache is working at the pool level. Outside exporting importing the pool containing the file system which I already suggested but that is not achievable with the root pool, another way might be to dynamically reduce the ARC max size and perhaps allocate some RAM for the OS to release pages. This will affect all ZFS datasets though.
 

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LEARN ABOUT DEBIAN

zdb

zdb(8)							  System Administration Commands						    zdb(8)

NAME

       zdb - ZFS debugger

SYNOPSIS

       zdb pool

DESCRIPTION

       The  zdb command is used by support engineers to diagnose failures and gather statistics. Since the ZFS file system is always consistent on
       disk and is self-repairing, zdb should only be run under the direction by a support engineer.

       If no arguments are specified, zdb, performs basic consistency checks on  the  pool  and  associated  datasets,	and  report  any  problems
       detected.

       Any options supported by this command are internal to Sun and subject to change at any time.

EXIT STATUS

       The following exit values are returned:

       0    The pool is consistent.

       1    An error was detected.

       2    Invalid command line options were specified.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWzfsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Unstable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       zfs(8), zpool(8), attributes(5)

SunOS 5.11							    31 Oct 2005 							    zdb(8)
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