SanDisk LB406S 400GB for ceph
- Thread starter Zombie
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According to https://www.storagereview.com/review/sandisk-lightning-enterprise-ssd-review-lb-406s these are enterprise ssds. So i wonder why you think they wouldnt work?
In the end it is a storage designed for datacenter use (like ceph is) and as long as they fulfill your requirements in terms of iops and throughput...
In the end it is a storage designed for datacenter use (like ceph is) and as long as they fulfill your requirements in terms of iops and throughput...
Well you are right they would work, but I guess I should give some more of my thoughts. I would be upgrading from 10K SAS drives so really any enterprise SSD will be a big improvement over my old drives. I guess between these SanDisk drives and drives like a intel DC SSD S3610 is there really a big difference between these two? Would I see big performance between these drives?
Work load is fairly heavy between mid afternoon to midnight on the servers. I just want to make sure that in a couple months I don't need to be looking for a different SSD again. Also I know going from the SAS drives to an SSD will be huge, but I don't know how big of a difference from the example of the two I listed (sandisk and intel s3610) would be.
If you need me to clarify more I can or if it makes sense or not.
Thanks for your time!
Work load is fairly heavy between mid afternoon to midnight on the servers. I just want to make sure that in a couple months I don't need to be looking for a different SSD again. Also I know going from the SAS drives to an SSD will be huge, but I don't know how big of a difference from the example of the two I listed (sandisk and intel s3610) would be.
If you need me to clarify more I can or if it makes sense or not.
Thanks for your time!
This all depends on your exact workload.Also I know going from the SAS drives to an SSD will be huge, but I don't know how big of a difference from the example of the two I listed (sandisk and intel s3610) would be.
Streaming / sequential patterns will not be much faster, because those can be handled fairly easily by HDDs as well and they can get up to 300 MB/s transfer rates. You might see increases of 2 times (conservative) of an SSD - but it depends on the SSD and there typically the size of the SSD. Smaller SSDs (200 GB) might even perform less!
If you have random access then the situation is a lot different. Assuming your HDD does about 200 IOps (rough number) then an SSD typically (without specing further) can be estimated with constant/steady state performance of 5000 IOPs So the factor is 25x.
I don't think you will notice much difference between the SANdisk and Intel. You should get something that can handle you WRITES and the WRITE-VOLUME. That determines if you need to purchase new / other gear soon.
In the end writes are killing the cells (wear-out) so this is what you should be concerned about.
Thank you tburger! Lot of good information for me to process and determine what exactly where the work load is used. Right now it appears to be leaning towards the random access, but I am going to watch for a couple of weeks to make sure I do the right upgrades the first time.
Thanks again!
Thanks again!
@tburger All good here! I have been a bit busy with a couple extra projects on top of this one, so I have had to put this on the back burner for a hot minute. I saw a solution onliine (dont' have the link right now) for being able to get the ceph information into grafana with a ceph exporter. I am going to try and do that either tomorrow or the next day, projects depending.