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Vmware disk expand and create new disk question
Posted on 2012-12-20
I have a linux box running of vmware and I have added 100GB as third drive, added to volume group and extended the volume, but is there any performance difference by expanding the disk instead of creating new disk?
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8 Comments
No..none. Assuming this is a 'data volume' & not a system volume, and assuming your "linux" OS version supports it, it is recommended to use a pvscsi scsi controller driver for data disks (not system disks) for better performance. But, using that controller type is also only recommended if you have IOPS > 2000 over that disk.
Regards.
~coolsport00
Regards.
~coolsport00
If you are using a SAN as your storage, the answer is no. It is still straight IOPs back to the SAN. However, you might want to consider a different block size for performance vs waste of padded space.
Active today
No, but it's not recommended, because you will create two snapshots per parent disk, which can cause you issues in the future.
Active today
Thank you very much. Yes, disk from SAN. Is there any performance in OS? Does system need more cpu cycle, if we add as a second disk instead on increasing?
Nope, as long as you can extend, you are good. FYI, you cannot have any snapshot if you choose to extend the vmdk.
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I've requested that this question be closed as follows:
Accepted answer: 125 points for traoher's comment #a38710861
Assisted answer: 125 points for coolsport00's comment #a38710795
Assisted answer: 125 points for traoher's comment #a38710801
Assisted answer: 0 points for mokkan's comment #a38710827
Assisted answer: 125 points for coolsport00's comment #a38710833
for the following reason:
thank you all of you guys.
Accepted answer: 125 points for traoher's comment #a38710861
Assisted answer: 125 points for coolsport00's comment #a38710795
Assisted answer: 125 points for traoher's comment #a38710801
Assisted answer: 0 points for mokkan's comment #a38710827
Assisted answer: 125 points for coolsport00's comment #a38710833
for the following reason:
thank you all of you guys.
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