Zfs snapshot question

Hi guys,
I will really appreciate it if someone can answer this for me.
I do understand that you can use snapshots to back up file systems. But they also use up pool space when their file systems grow.
So, is it necessary to create zfs snapshots even when you already have a full system back up in place?
Thank you very much for your kind explanation.
Arrey

985798 wrote:
So, is it necessary to create zfs snapshots even when you already have a full system back up in place? Nobody will force you to create or keep snapshots and if you are happy with taking "classic" backups then there may be no need for additional snapshots. And since snapshots will also take up space in your pool, it is usually a good idea to keep them only for a short period and delete them periodically. I like to use snapshots for two purposes:
- create a snapshot, then write that snaptshot to take and destroy it afterwards. that way, you can guarantee that this tape backup is consistent
- create snapshot at regular intervals and keep them around for a few days so that if I need to restore a file from just a day ago I don't have to go back to tapes but can rather fetch it from the snapshot. So that would be in addition to regular backups
cheers
bjoern

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Zfs snapshots and booting ...

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In solaris 9, filesystem snapshots did not survive reboots. Do zfs snapshots in solaris 10 persist across reboots ?
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thanks.

Does this mean that when new machines appear with zfs
support, OR when I can update my PROM, that I will be
able to boot a zfs partition ?ZFS isn't out yet, so your question is premature. We'll get a look at it within a few weeks, hopefully.
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I don't see any particular reason that PROM or hardware support is required, it should just need a bootloader that understands ZFS. I don't think that there's any UFS support in the existing proms. Just stuff that understands the VTOC label and how to load and execute a few blocks from a particular slice.
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Regards
Siva

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fstat64(2, 0x08045BF0)                          = 0
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Hi Robert,
Thanks for your response. I suspected this might be the case, but it seems like I get conflicting information from the Sun website. It still says recommended and security patches are free everywhere I looked except when I went to download them. We got this machine in October and I obtained and installed a recommended patch cluster as well as a bunch of ZFS patches (it might have even been early November, shortly before the update), using only a valid account with no contract.
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http://docs.huihoo.com/opensolaris/solaris.../html/ch06.html
http://docs.huihoo.com/opensolaris/solaris...ml/ch06s02.html

Hi,
The mentioned links in the post is not working.
I would suggest u to raise an Official S.R. with http://support.oracle.com prior upgrading your database.
Also you can try this out with 10g db installation on TEST machine and create databases as ZFS Snapshots/ZFS Clones at the OS level for MOCK. Then upgrade the 10g database and test it.
Refer:
*429825.1 -- Complete Checklist for Manual Upgrades to 11gR1*
*837570.1 -- Complete Checklist for Manual Upgrades to 11gR2*
Regards,
X A H E E R

Zfs newbie question

Hello
I have a fresh Solaris 10/6 install. My disk have 20Gb but I used only
10GB for the base solaris installation and home directory.
I have 10GB free without any partition.
I would like to use my free space to store my zones using zfs filesystem.
In example:
/zones
/zone/zona1
/zone/zone2
How I can create "/zones" filesystem ?
zpool create zones ?????
?????: What I must write ?
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df -h
Sistema de archivos tama�� usados aprovechar capacidad Montado en
/dev/dsk/c0d0s0 4,7G 3,1G 1,5G 67% /
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objfs 0K 0K 0K 0% /system/object
/usr/lib/libc/libc_hwcap1.so.1
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fd 0K 0K 0K 0% /dev/fd
swap 815M 8K 815M 1% /tmp
swap 815M 28K 815M 1% /var/run
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roberto pereyra

At least make a token attempt to read the documentation
http://docs.sun.com/app/docs/doc/819-5461
Then if you have a specific question someone will more likely to answer you.
Otherwise it sounds like your saying, "I'm too lazy to read any documentation. Can someone tell me all about it".
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Is there any way to refresh the zfs snapshot other than creating another on

Hi,
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SunStorage 7110 + zfs snapshot

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aksh: invalid command "zfs recv -F pool-0/[email protected]"
aksh: invalid command "IûIûIÊ(Ê(IIIIf:ÿÿ Á!III:I:I:I:IûIIûIIIISISISISIÿIIIIIIIIIIIIIIIûIp}ûI A
@# |øI"
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Hi Robert,
Thanks for your response. I suspected this might be the case, but it seems like I get conflicting information from the Sun website. It still says recommended and security patches are free everywhere I looked except when I went to download them. We got this machine in October and I obtained and installed a recommended patch cluster as well as a bunch of ZFS patches (it might have even been early November, shortly before the update), using only a valid account with no contract.
It would have been nice to know the policy on patch clusters was changing shortly, since now I want to use the snapshots as a backup for users.
For us at least, an upgrade install would be a royal pain in the butt, since this machine is sitting in a data center in the basement and that would entail me signing in there and sitting on the floor while it installs from DVD media.

ZFS Configuration question

Hello,
I have 2 x 140GB (hw Raid-0 + spare). About 20GB is allocated to Solaris on UFS (standard installation and partitions/slices).
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I have no room for the ZFS partition on a slice. I
have a lot of free space unallocated to any partition
and this is where I would like the ZFS partition.You would need to allocate it to one yourself.
I
saw a lot of confusion between slices and
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However, I often try to use the term "slice" for the solaris label subdivision, leaving "partition" to refer to x86 architecture-specific divisions.
Solaris on x86 can only (easily) use a single x86 partition of type "Solaris". You can't use another partition (whether with ZFS or not).
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Hello All,
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--Pete

ZFS Configuration Question - Also posted in Solaris x86

Hello,
I have 2 x 140GB (hw Raid-0 + spare). About 20GB is allocated to Solaris on UFS (standard installation and partitions/slices).
I would like to allocate the 120GB left on the disk drive to ZFS. That space is not unallocated to any file system for now.
I found a lot of documentation of how to create a ZFS Pool on an empty disk drive. The documentation is less clear on how to do it on a drive already use by another FS.
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Michel

Darren,
I just setup another Solaris x86 server tonight to play with. That future production server is in it's own vlan wtih no Internet access for now.
The test server has the same configuration, but less disk space.
Here is the output of prtvtoc
# prtvtoc /dev/dsk/c0t0d0s0
* /dev/dsk/c0t0d0s0 partition map
* Dimensions:
* 512 bytes/sector
* 63 sectors/track
* 255 tracks/cylinder
* 16065 sectors/cylinder
* 2350 cylinders
* 2348 accessible cylinders
* Flags:
* 1: unmountable
* 10: read-only
* First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
0 2 00 10522575 27198045 37720619 /
1 3 01 16065 8401995 8418059
2 5 00 0 37720620 37720619
7 8 00 8418060 2104515 10522574 /export/home
8 1 01 0 16065 16064
Output of format
selecting c0t0d0
[disk formatted]
Warning: Current Disk has mounted partitions.
/dev/dsk/c0t0d0s0 is currently mounted on /. Please see umount(1M).
Total disk size is 8920 cylinders
Cylinder size is 16065 (512 byte) blocks
Cylinders
Partition Status Type Start End Length %
====== ====== ============ ===== === ====== ===
1 Active Solaris2 1 2350 2350 26
As you can see, the 1st partition is used at 26%. With fdisk, I can create a 2nd partition. My problem is to get that 2nd partiition availlable to Solaris and create a zpool in that unused space..
Michel

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hi,
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Hi:
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Edited by: tomykety on May 29, 2013 2:00 AM

Welcome to the oracle forums!
Please take some time to go through [url https://forums.oracle.com/forums/ann.jspa?annID=1535]FAQ PAGE
Always post 4 digit oracle version and OS details.
Please post the output of DBA_HIST_SNAPSHOT view,this will show what shapshot you have with their begin and end time.
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