managin different disk sizes with ceph

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benoitc

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Dec 21, 2019
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We have a cluster of 3 machines that have 2x460GB SSD HD on each and we plan to add 2x960GB to each. AT first we were thinking to just replace the 480GB disks but now I am wondering if we can mix disks from different size.


How will work the replication in such case? What's the best pattern for it?
 
benoitc said:
How will work the replication in such case? What's the best pattern for it?
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Keep them evenly distributed. Ceph will use different ratios for those disks and fill them accordingly.
 
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Alwin said:
Keep them evenly distributed. Ceph will use different ratios for those disks and fill them accordingly.
Click to expand...
so i just need to add the 2 disks on eahc machines and it wil be good? ie having 2x480+2x960 on each ? That's pretty cool :)
 
To add, in any case (as always) you will need to keep an eye on the usage.
 
Hello @benoitc , I'm starting to implement CEPH here. Could you please report whether this arrangement of yours was successful. did it meet your needs?
 
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