Re: [Astlinux-users] Storage performance

[Michael K. <mic...@ip...>]

Hi Lonnie

Its a great IaaS solution. Here is a good explanation from one of our cloud providers https://www.serversaustralia.com.au/products/virtual-data-centre

Thanks for the info here. Yes htop is nice. I only have 1.4 in build so not much disk traffic so will need to check later. From what I saw in our build environment I think we will be fine.

Regards
Michael Knill

On 21/7/2022, 9:11 am, "Lonnie Abelbeck" <li...@lo...> wrote:

    Hi Michael,

    Out of curiosity, what do you mean by "Virtual DC" ?  I'm not familiar with that term.


    If you are using AstLinux 1.4.3 or later, the kernel /proc/[pid]/io stats are enabled.

    So, look for "read_bytes" and "write_bytes" in the output of the 'init' process:
    --
    cat /proc/1/io
    --

    For Asterisk, this should work:
    --
    cat /proc/$(pgrep -f '^asterisk')/io
    --

    See how quickly "read_bytes" and "write_bytes" increase over a set period of time. Next convert into IOP by guessing an average block size.

    Note: some of this Disk IO is to RAM based tmpfs, but would give you a worst case scenario.

    Additionally, 'htop' supports IO_RATE column (DISK R/W) that can monitor IO.

    Lonnie



    > On Jul 20, 2022, at 2:29 PM, Michael Knill <mic...@ip...> wrote:
    > 
    > Hi Group
    >  
    > I am virtualising most Astlinux installs and now moving to Virtual DC’s where I have more control of the type of resources I allocate. One of these is the type of storage and usually in the form of IOP’s.
    > For example I can purchase storage ranging from 100 IOP’s to 25,000 IOP’s. Now although the difference in price is not huge, it does add up and I want to try to minimise costs where possible.
    > I have been using 250 IOP’s and I have not seen any problems but just wondering if this is too low? Even though am writing logs to KD, I assumed that the Astlinux architecture was still pretty light on in regards to disk writes.
    >  
    > Thanks
    > Mike
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