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SSD-cache setup

dhamaniasaddhamaniasad Member
in Help

I have a server with a 500GB HDD and a 128GB SSD, both attached to SATAII ports.
What I want to do is utilize the SSD drive for caching purposes to improve IO performance, but I am not very sure of how I can achieve that setup, as I cannot add any hardware to the server.
I've heard about flashcache, but I don't know anything about it. I want to install CentOS 6.5 on this server.
Can somebody tell me how to setup SSD caching on this server?

Comments

  • charliecharlie Member, Host Rep

    Hi!

    Are you want to use this server to virtualisation, or a regular server?

    What kind of services are you want to run on it?

  • ynzhengynzheng Member

    how about using ssd as swap

  • dhamaniasaddhamaniasad Member

    @charlie said:
    Hi!

    Are you want to use this server to virtualisation, or a regular server?

    What kind of services are you want to run on it?

    Virtualization. QEMU.

  • dhamaniasaddhamaniasad Member

    @ynzheng said:
    how about using ssd as swap

    Not sure how that would work out. Since from experience, VPSes don't really use SWAP that much.

  • prae5prae5 Member

    Google flashcache / bcache / dm-cache

    All provide means for using ssd as cache device, but are still somewhat beta stage, maybe not an option if its a production box

  • dhamaniasaddhamaniasad Member

    @prae5 said:
    Google flashcache / bcache / dm-cache

    All provide means for using ssd as cache device, but are still somewhat beta stage, maybe not an option if its a production box

    Its a production box. Does that mean I have to purchase some hardware in order to be able to utilize the SSD for caching?

  • prae5prae5 Member

    I haven't tested it in a while, so you will need to research when i looked at the options a few months ago they were all not production ready in my opinion.

  • dhamaniasaddhamaniasad Member

    @Zen said:
    If you can't follow the flashcache information and work it yourself I would not recommend asking for help setting it up, it's only a matter of time until you need help fixing it..changing it..recovering all of your data.. etc

    Either don't use it or read the docs and understand how it all works

    I had just seen a glimpse of the word flashcache somewhere before. Just read about it and figured out how to set it up.

  • petempetem Member

    FlashCache is easy to set up, however it doesn't work with the latest CentOS 6.5 kernel.

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