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Misunderstanding on your side.
Best answer. Provide both, and let the customers pick what they need and don't need. SSD caching is also a good option idea, IMO.
provide both or pure ssd and ssd-cache.
for me, i love ssd because if i have ex wallpaper site its more faster. it depend on client production project.
Please explain.
a vps with SSD does not get enough benefit for the cost involved. HDD are more reliable in case of a power failure or server problem. Some SSD won't go back online after a power failure, while a HDD will spin right up without an issue. SSD are much better on a dedicated hosting environment, such as a dedicated server, but on a vps it will only hike up the price for a small upside of performance
Thanks a lot for your valuable comment.
Can you tell me what you smoked? HDDs are much more likely to fail at sudden power failure than SSDs.
Small? 500% in IO speed (100MB/s vs ~500-550MB/s) , 5000%+ for IOPS (~250 vs. 25000+), again, small? What did you smoke and where can i buy it?
Isn't that obvious? SSD for performance/busy read writes, HDD for storage and sites where there's low disk io requirement.
SSD cached if you want to have something "faster but more economical (more storage space and cheaper to get)". Pure SSD if you want something fast, with less storage space. Depends on node capacity and your client/target base.
If you can make up your mind about things, go with pure SSD or pure HDD. If you can't, choose SSD Cached.
Still couldn't find a guide to create a cache pool for multiple LVMs. The only available documentations are talking about 1 cache pool for 1 LVM.
Most cache at the raid card level, LSI's cachecade, or a home baked way, look at flashcache https://github.com/facebook/flashcache/
Thanks a lot, I will check it out.
Should note that i DID have data loss with Flashcache before - The LSI HW implementation (can't talk about Adaptec, never used and theirs is rather new) was more stable.
Should suggest High Capacity SSD VPS to affordable customer, sure it have more advantage than the rest. Have to suggest the best one to customer.