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Re: [zfs-discuss] Adding my own compression to zfs

Subject: Re: [zfs-discuss] Adding my own compression to zfs
From: roland
Date: Sun, 07 Oct 2007 07:45:24 PDT
any news on additional compression-schemes for zfs ?

this is interesting research-topic, imho :)

so, some more real-world tests with zfs-fuse + lzo patch :

-LZO------------------------------------------------
zfs set compression=lzo mypool

time cp /vmware/vserver1/vserver1.vmdk /mypool

real    7m8.540s
user    0m0.708s
sys     0m24.839s

zfs get compressratio mypool
NAME    PROPERTY       VALUE   SOURCE
mypool  compressratio  1.74x   -

1.7G    vserver1.vmdk  compressed
3.0G    vserver1.vmdk  uncompressed

-LZJB------------------------------------------------
zfs set compression=lzjb mypool

time cp /vmware/vserver1/vserver1.vmdk /mypool

real    7m16.392s
user    0m0.709s
sys     0m25.107s

zfs get compressratio mypool
NAME    PROPERTY       VALUE   SOURCE
mypool  compressratio  1.47x   -

2.0G    vserver1.vmdk compressed 
3.0G    vserver1.vmdk uncompressed

-GZIP------------------------------------------------
zfs set compression=gzip mypool

time cp /vmware/vserver1/vserver1.vmdk /mypool/

real    12m54.183s
user    0m0.653s
sys     0m24.933s

zfs get compressratio
NAME    PROPERTY       VALUE   SOURCE
mypool  compressratio  2.02x   -

1.5G    vserver1.vmdk    compressed
3.0G    vserver1.vmdk    uncompressed


btw - lzo-patch for zfs-fuse (does apply to latest zfs-fuse sources) is at 
http://groups.google.com/group/zfs-fuse/attach/a489f630aa4aa189/zfs-lzo.diff.bz2?part=4
 
 
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