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Hi all,
I have a problem with snapshots.
I have a VOLUME (125 GB - 20% snapshot reserve) that contains a LUN (100 GB) for SQL data directly attacched to Windows Server 2008 x64.
Once I started to put data on that LUN, snapshot system told me that "SCHEDULED SNAPSHOT CREATE FAILED" and the most important error is:
"lun_SQL_data - hourly.0 : Snapshot operation failed: No space left on device."
I really don't know what can I do, please give me an advice!
Thankyou very much!
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Hi ,
Try
vol options lun_SQL_data fractional_reserve 5
then take a snapshot.
Regards.
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Hi ,
Try
vol options lun_SQL_data fractional_reserve 5
then take a snapshot.
Regards.
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I don't know what this string does but it worked
THANK YOU VERY MUCH!
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Generally (following netapp best practice) :
vol_size = lun size * 2.2
fractional reserve = 100% and turn off snapshot reservation.
Now, when you take first snapshot it will take 100% lun size...you need additional space for overrides.
Have a look at : http://www.netapp.com/us/library/technical-reports/tr-3483.html
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But now I don't need to do it anymore, right?
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Hello,
Because you changed your fractional reserve from 100% to 5% there is a chance that you're LUN can go offline. With the change you say to the volume the there will be reserved 5% of the volume for changes (in other words when the LUN is changed for 5% this changes can be saved). However, when you have 6% or chances and you're volume is 100% full and the autogrow of the volume is off then you're volume goes offline.
You need to be carefull when changing your fractional reserve.
Regards,
Eelco
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Elco is right,
When you decrease fractional_reserve , there is a chance LUN can go offline.
To prevent this issue, you can set "snap autodelete" and/or "vol autosize"
Example:
snap autodelete lun_SQL_data on
vol autosize lun_SQL_data -m 250g -i 2g on
To choose which one is first:
vol options lun_SQL_data tyr_first snap_delete
or
vol options lun_SQL_data tyr_first volume_grow
Regards.
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Mhh I'm not sure if I understand right.
This command should grow the LUN maximum to 250GB by 2GB of each step?
vol autosize lun_SQL_data -m 250g -i 2g on
These commands tell netapp: "When the space reserve is full, TRY to delete or grow (depending on what command I run)" Right?
vol options lun_SQL_data tyr_first snap_delete
or
vol options lun_SQL_data tyr_first volume_grow
Thank you!
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Just understood
RTFM!!!
Thank you all!
ps: Do I have to do it also on the other netapp? I think so...
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***********OLD******************When I have to issue the same commands on the other netapp, how can I do that?
I think I have to issue a SNAPMIRROR BREAK and the resize the volume... right?
After that I can do a SNAPMIRROR INITIALIZE correct? ***********OLD******************
Everything ok
I done it by breaking snapmirror, disabling fixed size of volume and then with the previous command I changed the size after that... snapmirror initialize
thank you all guys (once again)
Message was edited by: edp_citycarburoil
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Dear all,
Before some days i created 3 TB thik volume and from there i created 2 TB thik lun but from i chose the snap reserve option 0 and then from second day i getting daily below alert message.
HA Group Notification from storage (SCHEDULED SNAPSHOT CREATE FAILED) CRITICAl.
please can anyone suggest, do i need to do stop this error...????????????/
