Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?
Hi, My understanding is ZFS itself is a great file system by combining fs/vm with the numerous feature added to it. In the similar lines existing fs/vm and array snapshot are still in use and customers is requesting similar kind of support for zfs. So it would be very great help of getting similar interface to match the use cases looking for along with the new features. If a customer is having Solaris 9/10 with UFS /SVM stack, back applications run in the mentioned method ( earlier thread and other threads). If somebody moves from UFS/SVM stack to ZFS, customer expects the backup application should run in the similar configuration (at least for now). To match the requirements, zfs/zpool support is required. Off course down the line I am sure applications starts new methods provided by zfs to support it. Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] zpool import is this safe to use -f option in this case ?
Hi, I have done the following (which is required for my case) Created a zpool (smpool) on a device/LUN from an array (IBM 6K) on host1 created a array level snapshot of the device using dscli to another device which is successful. Now I make the snapshot device visible to another host (host2) I tried zpool import smpool. Got a warning message that host1 is using this pool (might be the smpool metata data has stored this info) and asked to use -f When i tried zpool import with -f option, I am able to successfully import to host2 and able to access all file systems and snapshots. My query is in this scenario is always safe to use -f to import ?? would there be any issues ? Also I have observed that zpool import took some time to for successful completion. Is there a way minimize zpool import -f operation time ?? Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] how to quiesce and unquiesc zfs and zpool for array/hardware snapshots ?
Hi Andrew, Regarding your point - You will not be able to access the hardware snapshot from the system which has the original zpool mounted, because the two zpools will have the same pool GUID (there's an RFE outstanding on fixing this). Could you please provide more references to above? as I am looking for options of accessing the snapshot device by reconfiguring it with an new pool name ( in turn as new GUID). Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Changing GUID
Hi I am looking in similar lines, my requirement is 1. create a zpool on one or many devices ( LUNs ) from an array ( array can be IBM or HPEVA or EMC etc.. not SS7000). 2. Create file systems on zpool 3. Once file systems are in use (I/0 is happening) I need to take snapshot at array level a. Freeze the zfs flle system ( not required due to zfs consistency : source : mailing groups) b. take array snapshot ( say .. IBM flash copy ) c. Got new snapshot device (having same data and metadata including same GUID of source pool) Now I need a way to change the GUID and pool of snapshot device so that the snapshot device can be accessible on same host or an alternate host (if the LUN is shared). Could you please post commands for the same. Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] how to quiesce and unquiesc zfs and zpool for array/hardware snapshots ?
Hi, How it would help for instant recovery or point in time recovery ?? i.e restore data at device/LUN level ? Currently it is easy as I can unwind the primary device stack and restore data at device/ LUN level and recreate stack. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] how to quiesce and unquiesc zfs and zpool for array/hardware snapshots ?
Hi Darren, Thanks you for the details. I am aware of export/import of zpool. but with zpool export pool is not available for writes. is there a way I can freeze zfs file system at file system level. As an example, for JFS file system using chfs -a freeze ... option. So if I am taking a hardware snapshot, I will run chfs at file system (jfs ) level then fire commands to take snapshot at harware level (or for array LUNS) to get consistent backup. I thins case, no down time is required for the file system. Once snapshot is done, i will do qu quiesce / freeze the file system. Looking for how to do similar freeze for zfs file system. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] how to quiesce and unquiesc zfs and zpool for array/hardware snapshots ?
Hi Darren, In shot I am looking a way to freeze and thaw for zfs file system so that for harware snapshot, i can do 1. run zfs freeze 2. run hardware snapshot on devices belongs to the zpool where the given file system is residing. 3. run zfs thaw Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] how to quiesce and unquiesc zfs and zpool for array/hardware snapshots ?
Hi, How I can I quiesce / freeze all writes to zfs and zpool if want to take hardware level snapshots or array snapshot of all devices under a pool ? are there any commands or ioctls or apis available ? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] zpool split how it works?
Hi, I was wondering how zpool split works or implemented. If a pool pool1 is on a mirror having two devices dev1 and dev2 then using zpool split I can split with the new pool name say pool-mirror on dev2. How split can change metadata on dev2 and rename/replace and associate with new name i.e. pool-mirror ?? Could you please let me know more about it? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool split how it works?
Hi Darren, Thanks for your info. Sorry below might be lengthy : Yes I am looking for actual implementation rather how to use zpool split. My requirement is not at zfs file system level and also not zfs snapshot. As I understood, If my zpool say mypool is created using zpool create mypool mirror device1 device2 and after running : zfs split mypool newpool device2 , I can access device2 with newpool Same data on newpool is available as mypool as long as there are no writes/modifications to newpool. What i am looking for is, if my devices ( say zpool is created with only one device device1) are from an array and I took array snapshot ( zfs /zpool doesn't come in picture as I take hardware snapshot), I will get a snapshot device say device2. I am looking for a way to use the snapshot device device2 by recreating the zpool and zfs stack with an alternate name. zpool split must be doing some changes to metadata of device2 to associate with the new name i.e. newpool, I want to do it for the same for snapshot device created using array/hardware snapshot. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] is opensolaris support ended?
Thanks for your help. I would check this out. Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] changing zpool information
Hi, If I compare zpool is like volume group or disk group, as an example on AIX we have aixlvm. AIX lvm provideds command like recreatevg by providing snashot devices. In case of HPLVM or for Linux LVM, we can create a new vg/lv structure and add the snapshoted devices in that and then we import the vg. I would like to know fo zpool for snapshot devices once array snapshot is taken. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] rename zpool
zfs close is at zfs file system level. what i am look here is rebuild the file system stack from bottom to top. Once i took the snapshot ( hardware) the snapshot devices carry same copy of data and meta data. If my snapshot device is dev2 then, the metadata will have smpoolsnap. If I need to use dev2 on the same machine since smpoolsnap is already present on dev1 which throws error. what I am looking for is if I can modify this metadata, I can use dev2 with an alternate name so that all file systems would be available with an alternate zpool name. As I mentioned below, I can do it for HPLVM or AIXLVM ( recreatevg command) if i create a snapshot at array level. Thanks Regards, sridhar -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] is opensolaris support ended?
Hi, I have downloaded and using opensolaris virtual box image which shows below versions zfs version 3 zpool version 14 cat /etc/release shows 2009.06 snv_111b X86 Is this final build available ?? Can i upgrade it to higher version of zfs/zpool ? can i get any updage vdi image to seek zfs/zpool having zpool split support? please help Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] how to upgrade
Hi, zfs upgrade shows version as 4 and zpool upgrade shows version as 15. and etc/release show Solaris 10 10/09 s10s_u8wos_08a SPARC. And my zpool doen't have support for split. Could you please suggest me how to upgrade my Solaris box with latest version for zfs and zpool to get updated support. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] rename zpool
Hi Cindys, Thank you for reply. zfs/ zpool should have ability of accessing snapshot devices with a configurable name. As an example if file system stack is created as vxfs( /mnt1) | | vxvm(lv1) | | (device from an array / LUN say dev1), If i take array level or hardware level snapshot, and the snapshot device for dev1 is say dev2 then we can rename dev2 properties to access the dev2 with new name say lv1_snap. And further access file system with /mnt1_newmount. This also can be done if hplvm also present. I am looking for similar kind of ability with zfs/zpool presence. zfs (smpool/fs1) | | smpool | | (device from an array / LUN say dev1) Once I took array or hardware snapshot of dev1 and got dev2, I am looking for something which I can access the snapshot device dev2 is accessible with smpoolsnap or any name keeping smpool active. And further fs1 is accessible as smpoolsnap/fs1 as read only. If zfs/zpool do not have this support is there a way I can open an issue so that in next releases it will be available ?? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] rename zpool
Hi, I have two questions: 1) Is there any way of renaming zpool without export/import ?? 2) If I took hardware snapshot of devices under a zpool ( where the snapshot device will be exact copy including metadata i.e zpool and associated file systems) is there any way to rename zpool name of snapshotted devices ?? without losing data part? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] best way to check zfs/zpool version programatically
Hi, what is the right way to check versions of zfs and zpool ?? I am writing piece of code which call zfs command line further. Before actually initiating and going ahead I wan to check the kind of version zfs and zpool present on the system. As an example zpool split is not present on prior to 134 build (not sure exactly) so if an application using my code should fail if zpool split is called. Is there any zfs version or zpool version command present in recent updates? or is there any other way ( reading some file ) I can get these details? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] moving newly created pool to alternate host
Hi Cindys, Thank you for step by step explanation and it is quite clear now. Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] moving newly created pool to alternate host
Hi Cindys, Thanks for your mail. I have some further queries here based on your answer. Once zfs split creates new pool (as per below example it is mypool_snap) can I access mypool_snap just by importing on the same host Host1 ?? what is the current access method of newly created mypool_snap ? is it read-write or read only ? If it is read-write is there a way I can make it read only so that backup application cannot misuse. Also I want (or going to use ) mypool_snap as read only on alternate host i.e. host2. Could you please let me know what all steps I need to take on host1 and then on host2 once zpool split is done. I can guess as after zpool split, mypool_snap is not visible to host1. Once needs to import explicitly. Instead of importing on same host i.e. host1 can i go to host2 where split node devices are visible and directly run zpool import mypool_snap which will be further used as read only for backup ?? Could you please provide more details. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] calling zfs snapshot on multiple file systems under same pool or dirrerent
Hi, I could able to call zfs snapshot on individual file system/ volume using zfs snapshot filesystem|volume Or I can call zfs -r snapshot filesys...@snapshot-name to take all snapshots. I there a way I can specify more than 1 file system/volume of same pool or different pool to call a single zfs snapshot ?? Ex: pool/fs1 , poo2/fs2 is there any mechanism i can call zfs snapshot pool/f...@snap1 pool2/f...@snap1 Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] Any way for snapshot zpool with RAIDZ or for independent devices
Hi, With recent additions, using zpool split I could split a mirrored zpool and create new pool with the given name. Is there any direct or indirect mechanism where I can create snapshot of devices under a existing zpool where new devices are created so that I can recreate stack (new zpool and all file systems) without modifying the data. So that with new stack i can able to access consistent (snapshot ) data (which is same as data present on original when backup took) with the new stack created. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] create mirror copy of existing zfs stack
Hi, I have a mirror pool tank having two devices underneath. Created in this way #zpool create tank mirror c3t500507630E020CEAd1 c3t500507630E020CEAd0 Created file system tank/home #zfs create tank/home Created another file system tank/home #zfs create tank/home/sridhar After that I have created files and directories under tank/home and tank/home/sridhar. Now I detached 2nd device i.e c3t500507630E020CEAd0 Since the above device is part of mirror pool, my guess it will have copy of data which is there in other device till detach and will have metadata with same pool name and file systems created. Question is is there any way I can create a new stack with renamed stack by providing the new pool name to this detached device and should access the same data for the c3t500507630E020CEAd0 which was created when it was in mirrored pool under tank. ? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] create mirror copy of existing zfs stack
Thank you for your quick reply. When I run below command it is showing. bash-3.00# zpool upgrade This system is currently running ZFS pool version 15. All pools are formatted using this version. How can I upgrade to new zpool and zfs versions so that I can have zpool split capabilities ? I am bit new to Soaris and zfs. Could you please help how can I upgrade ? Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] create mirror copy of existing zfs stack
I am using solaris 10 9/10 SARC x64 version. Following are output of release file and uname -a respectively. bash-3.00# cat /etc/release Solaris 10 10/09 s10s_u8wos_08a SPARC Copyright 2009 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms. Assembled 16 September 2009 bash-3.00# uname -a SunOS oigtsol12 5.10 Generic_141444-09 sun4u sparc SUNW,Sun-Fire-V440 I think zpool split is available with build 135. Not sure which build signifies of the version which I am using. I have also tried zpool upgrade -a but didn't find any difference. Thanks Regards, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] recreating stack (zpool and zfs) once hardware snapshot is taken.
Hi, Follow is what I am looking for. I need to take hardware snap shot of devices which are provided under zfs file system. I could identify type of configuration using zpool status and get the list of disks. For example : if a single LUN is assigned to zpool and a file system is created for mpool/myfs. Say the LUN is 1002. so the stack would be myfs file system under mypool which is created from a LUN 1002. Once I took snapshot for LUN 1002 on 1003 then new device I got is 1003 as snapshot device.. I would like to know how can I recreate the stack similar to existing say zpool mypool_snap and file system myfs_snap. I found some information that zpool export and import needs to be done before taking snapshot. wondering how i can use it for my requirement. Thanks, sridhar. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
