Date: Tue, 29 Mar 2011 17:57:49 +0300 From: George Kontostanos <gkontos.mail@gmail.com> To: freebsd-current@freebsd.org Subject: ZFS dedup and temporary freeze Message-ID: <AANLkTik_25%2BTr10dLKnOZaGnnHYpDmF=PBAueoxCUoZB@mail.gmail.com>
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Hi List,
I am using dedup=on for my ezjail /jails directory. I noticed a strange
behavior during the installation of the ports tree in the basejail. The
system appears to freeze for a while and the cpu appears to be idle during
that time. The same behavior is shown when building ports inside the jail.
Here is some information about the pool:
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
zhome 15.0G 59.5G 4 14 61.2K 468K
zhome 15.0G 59.5G 38 66 107K 68.9K
zhome 15.0G 59.5G 43 71 119K 45.0K
zhome 15.0G 59.5G 37 67 103K 45.0K
zhome 15.0G 59.5G 39 103 102K 4.71M
zhome 15.0G 59.5G 42 72 114K 45.0K
zhome 15.0G 59.5G 36 59 97.9K 37.0K
zhome 15.0G 59.5G 42 69 114K 48.0K
zhome 15.0G 59.5G 39 72 105K 43.5K
zhome 15.0G 59.5G 33 58 93.4K 42.0K
zhome 15.0G 59.5G 44 77 117K 53.4K
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
zhome 74.5G 15.8G 58.7G 21% 1.06x ONLINE -
I thought that jails would be a good candidate for dedup. So far I am using
it without any issues in my /usr/src and /virtualBox directories.
Best Regards
--
George Kontostanos
aisecure.net <http://www.aisecure.net>;
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