Hi, Please help answering the following queries: 1. Can we reduce the size of a file system if we use ZFS? 2. Can we use ZFS is the storage array is EMC DMX-4? Thanks in Advance. Regards Vikas
Vikas, On Wed, Aug 27, 2008 at 01:29:49PM +0530, Vikas Kakkar wrote:> > Hi, > > Please help answering the following queries: > > 1. Can we reduce the size of a file system if we use ZFS?The size of the filesystem is dynamic. ie. it depends on the size of the pool. The only way to limit the size of the filesystem is by applying quota on it. And quota can be dynamically increased/decreased. NOTE : Ofcourse we cannot reduce the quota to anything lesser than what the filesystem is already consuming.> > 2. Can we use ZFS is the storage array is EMC DMX-4?Not sure about the specifics. But, as long as the box can publish its LUNs as disks on a host it should work. Regards, Sanjeev.> > Thanks in Advance. > > Regards > Vikas > > > > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
On 27 August, 2008 - Sanjeev sent me these 1,1K bytes:> Vikas, > > On Wed, Aug 27, 2008 at 01:29:49PM +0530, Vikas Kakkar wrote: > > > > Hi, > > > > Please help answering the following queries: > > > > 1. Can we reduce the size of a file system if we use ZFS? > > The size of the filesystem is dynamic. ie. it depends on the size of the pool. > The only way to limit the size of the filesystem is by applying quota on it. > And quota can be dynamically increased/decreased. > > NOTE : Ofcourse we cannot reduce the quota to anything lesser than what the > filesystem is already consuming.Currently, you can not reduce the size of the pool. Once you add a disk to a pool, you can only get rid of it by replacing it with something equally or larger in size. /Tomas -- Tomas ?gren, stric at acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Ume? `- Sysadmin at {cs,acc}.umu.se
Tomas, On Wed, Aug 27, 2008 at 11:57:09AM +0200, Tomas ?gren wrote:> On 27 August, 2008 - Sanjeev sent me these 1,1K bytes: > > > Vikas, > > > > On Wed, Aug 27, 2008 at 01:29:49PM +0530, Vikas Kakkar wrote: > > > > > > Hi, > > > > > > Please help answering the following queries: > > > > > > 1. Can we reduce the size of a file system if we use ZFS? > > > > The size of the filesystem is dynamic. ie. it depends on the size of the pool. > > The only way to limit the size of the filesystem is by applying quota on it. > > And quota can be dynamically increased/decreased. > > > > NOTE : Ofcourse we cannot reduce the quota to anything lesser than what the > > filesystem is already consuming. > > Currently, you can not reduce the size of the pool. Once you add a disk > to a pool, you can only get rid of it by replacing it with something > equally or larger in size.You are right. But, that does not apply to the filesystem in that pool. Thanks and regards, Sanjeev.> > /Tomas > -- > Tomas ?gren, stric at acc.umu.se, http://www.acc.umu.se/~stric/ > |- Student at Computing Science, University of Ume? > `- Sysadmin at {cs,acc}.umu.se
Thanks for your email Sanjeev!! Actually customer wants to reduce the pool size, I guess we cannot do this today....there is a pending RFP on this. Would you know if ZFS is supported for Sun Cluster? Regards Vikas Sanjeev wrote:> Vikas, > > On Wed, Aug 27, 2008 at 01:29:49PM +0530, Vikas Kakkar wrote: > >> Hi, >> >> Please help answering the following queries: >> >> 1. Can we reduce the size of a file system if we use ZFS? >> > > The size of the filesystem is dynamic. ie. it depends on the size of the pool. > The only way to limit the size of the filesystem is by applying quota on it. > And quota can be dynamically increased/decreased. > > NOTE : Ofcourse we cannot reduce the quota to anything lesser than what the > filesystem is already consuming. > > >> 2. Can we use ZFS is the storage array is EMC DMX-4? >> > > Not sure about the specifics. But, as long as the box can publish its > LUNs as disks on a host it should work. > > Regards, > Sanjeev. > >> Thanks in Advance. >> >> Regards >> Vikas >> >> >> >> >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss at opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >>-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20080827/771bff31/attachment.html>
Vikas Kakkar <Vikas.Kakkar at Sun.COM> writes: [..]> Would you know if ZFS is supported for Sun Cluster? >ZFS is supported as a failover filesystem in SunCluster 3.2. There is no support for ZFS as a global filesystem. HTH, Boyd
Thank you all for answering these questions!! Regards Vikas Boyd Adamson wrote:> Vikas Kakkar <Vikas.Kakkar at Sun.COM> writes: > [..] > >> Would you know if ZFS is supported for Sun Cluster? >> >> > > ZFS is supported as a failover filesystem in SunCluster 3.2. There is no > support for ZFS as a global filesystem. > > HTH, > > Boyd >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20080827/66394bc1/attachment.html>
Hi Vikas, On Wed, Aug 27, 2008 at 03:38:27PM +0530, Vikas Kakkar wrote:> Thanks for your email Sanjeev!! > > Actually customer wants to reduce the pool size, I guess we cannot do this today....there is a pending RFP on this.You are right. I got confused because, you were refering to a filesystem and not pool :)> > Would you know if ZFS is supported for Sun Cluster?Yes, ZFS can used as a HA filesystem (HAStoragePlus resource). However, you cannot use it as a global filesystem Thanks and regards, Sanjeev.> > Regards > Vikas > > > > > > > Sanjeev wrote: > >Vikas, > > > >On Wed, Aug 27, 2008 at 01:29:49PM +0530, Vikas Kakkar wrote: > > > >>Hi, > >> > >>Please help answering the following queries: > >> > >>1. Can we reduce the size of a file system if we use ZFS? > >> > > > >The size of the filesystem is dynamic. ie. it depends on the size of the pool. > >The only way to limit the size of the filesystem is by applying quota on it. > >And quota can be dynamically increased/decreased. > > > >NOTE : Ofcourse we cannot reduce the quota to anything lesser than what the > >filesystem is already consuming. > > > > > >>2. Can we use ZFS is the storage array is EMC DMX-4? > >> > > > >Not sure about the specifics. But, as long as the box can publish its > >LUNs as disks on a host it should work. > > > >Regards, > >Sanjeev. > > > >>Thanks in Advance. > >> > >>Regards > >>Vikas > >> > >> > >> > >> > >>_______________________________________________ > >>zfs-discuss mailing list > >>zfs-discuss at opensolaris.org > >>http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > >> >
>>>>> "vk" == Vikas Kakkar <Vikas.Kakkar at Sun.COM> writes:vk> Actually customer wants to reduce the pool size, I guess we vk> cannot do this today....there is a pending RFP on this. RFE 4852783 is decreasing. There was maybe some recent activity about INcreasing a pool size which you can do already, but adding ability to notice the change in LUN size without disconnecting the LUN and without exporting the pool. I may have misunderstood though. Anyway, currently you can increase only, not decrease, and it is offline increasing---you must export and import the pool. It''s offline, but it''s instantaneous and silent, meaning there''s no zfs_expand tool that runs for an hour or anything. so, for now, adding devices can be done online, but increasing is offline and decreasing/removing/raid-type-migration is impossible. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 304 bytes Desc: not available URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20080827/73b1df1a/attachment.bin>