Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Fajar A. Nugraha
On Tue, Jul 10, 2012 at 4:25 PM, Jordi Espasa Clofent jespa...@minibofh.org wrote: Hi all, By default I'm using ZFS for all the zones: admjoresp@cyd-caszonesrv-15:~$ zfs list NAME USED AVAIL REFER MOUNTPOINT opt 4.77G 45.9G 285M /opt

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Jordi Espasa Clofent
On 2012-07-10 11:34, Fajar A. Nugraha wrote: compression = possibly less data to write (depending on the data) = possibly faster writes Some data is not compressible (e.g. mpeg4 movies), so in that case you won't see any improvements. Thanks for your answer Fajar. As I said in my initial

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Ian Collins
On 07/10/12 09:25 PM, Jordi Espasa Clofent wrote: Hi all, By default I'm using ZFS for all the zones: admjoresp@cyd-caszonesrv-15:~$ zfs list NAME USED AVAIL REFER MOUNTPOINT opt 4.77G 45.9G 285M /opt opt/zones 4.49G

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Fajar A. Nugraha
On Tue, Jul 10, 2012 at 4:40 PM, Jordi Espasa Clofent jespa...@minibofh.org wrote: On 2012-07-10 11:34, Fajar A. Nugraha wrote: compression = possibly less data to write (depending on the data) = possibly faster writes Some data is not compressible (e.g. mpeg4 movies), so in that case you

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Jordi Espasa Clofent
Thanks for you explanation Fajar. However, take a look on the next lines: # available ZFS in the system root@sct-caszonesrv-07:~# zfs list NAME USED AVAIL REFER MOUNTPOINT opt 532M 34.7G 290M /opt opt/zones243M 34.7G

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Ferenc-Levente Juhos
Of course you don't see any difference, this is how it should work. 'ls' will never report the compressed size, because it's not aware of it. Nothing is aware of the compression and decompression that takes place on-the-fly, except of course zfs. That's the reason why you could gain in write and

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Jordi Espasa Clofent root@sct-caszonesrv-07:~# zfs set compression=on opt/zones/sct-scw02- shared If you use compression=on, or lzjb, then you're using very fast compression. Should not hurt

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Darren J Moffat
On 07/10/12 12:45, Ferenc-Levente Juhos wrote: Of course you don't see any difference, this is how it should work. 'ls' will never report the compressed size, because it's not aware of it. Nothing is aware of the compression and decompression that takes place on-the-fly, except of course zfs.

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Jordi Espasa Clofent
On 2012-07-10 13:45, Ferenc-Levente Juhos wrote: Of course you don't see any difference, this is how it should work. 'ls' will never report the compressed size, because it's not aware of it. Nothing is aware of the compression and decompression that takes place on-the-fly, except of course zfs.

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Mike Gerdts
On Tue, Jul 10, 2012 at 6:29 AM, Jordi Espasa Clofent jespa...@minibofh.org wrote: Thanks for you explanation Fajar. However, take a look on the next lines: # available ZFS in the system root@sct-caszonesrv-07:~# zfs list NAME USED AVAIL REFER MOUNTPOINT opt

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Jim Klimov
2012-07-10 15:49, Edward Ned Harvey wrote: If you use compression=on, or lzjb, then you're using very fast compression. Should not hurt performance, in fact, may gain performance for highly compressible data. If you use compression=gzip (or any gzip level 1 thru 9) then you're using a fairly

Re: [zfs-discuss] Benefits of enabling compression in ZFS for the zones

2012-07-10 Thread Richard Elling
To amplify what Mike says... On Jul 10, 2012, at 5:54 AM, Mike Gerdts wrote: ls(1) tells you how much data is in the file - that is, how many bytes of data that an application will see if it reads the whole file. du(1) tells you how many disk blocks are used. If you look at the stat