About the license and CPUs

Discussion in 'General' started by Brainlag, Jan 10, 2008.

  1. auser

    auser Super Moderator

    interesting ... can you specify more about it: how can 12 disks achieve 5x IO performance than 4 disks? what's your RAID card? Thanks.
  2. mysitegroup

    mysitegroup Member

    Using IOZONE... you can easily test disk IO, and set block size and file size. If you want to test with noatime off or on, you can easily do that too - and know how much it helps on your system.


    You can also use SYSBENCH - use that to do OLTP benchmarks, test memory speed, and cpu speed. We have seen incorrectly matched memory cause as much as a 30% slowdown in the new Intel QUADQUAD and QUADHEX Dunningtons.


    We have several servers... with different RAID 10 ARRAYS, based on SATA drives, SAS (SCSI)drives, and even SSD (Solid State Memory) (Intel X25-E Extreme) drives. Some are 4 drive RAID 10, some 6 drive, and some are RAID 1. We don't use RAID 5.

    I have a file somewhere where I did a bunch of comparisons but I can't find it right now. Sorry.

    In a nutshell, a RAID 10 array of 4 SAS 300GB 15K RPM drives results in ~ 46,000 on the Random write test, while a RAID 10 array of 12 SAS 300GB 15K RPM drives results in ~ 300,000.

    The RAID 10 12 Disc Array is even faster than a single SSD drive.

    We have found the SSD drives in RAID don't do very well - seems the controllers are not really up to it yet, even the latest Adaptecs.

    We use the Adaptec \ 51645 \ SATA/SAS RAID controller in all our servers. Big onboard cache, fast co-processor, and 8x PCI.

    Warm regards.
  3. Yogesh Sarkar

    Yogesh Sarkar Banned

    But in case a vps is hosted on a dual quad core processor based server, wouldn’t multiple cores be available to it and would go to waste by the vps license being limited to one core?
  4. mistwang

    mistwang LiteSpeed Staff

    VPS is the same as 1-CPU before the connection limit reached. PHP/MySQL should be able to use all available CPU.
  5. nullspirit

    nullspirit New Member

    I currently have 2 quadcore server. Both webserver will be serving PHP/MYSQL, running CentOS.

    I was recommend to take the 2 CPU license for both server.

    My question is, what about the other two processor on the server?
  6. anewday

    anewday Well-Known Member

    Php and Mysql will be able to utilize all the cores while the litespeed only use 2 cores on each machine.
  7. phattran911

    phattran911 Well-Known Member

    So the CPU means the number of cores, right? It is not number of processor.

    So if I have a Xeon Quad Core (1 processor, 4 cores), then in order to let litespeed to use all 4 cores, I need a 4-CPU license. Is that correct?
  8. anewday

    anewday Well-Known Member

    You are right.
  9. ESNET

    ESNET Member


    First of all i did mistake and i bought 1 cpu license because i believed it meant 1 server not core,
    so me practically i have to buy license for 8 cores from the moment that my server is 8 x 2.26GHz, correct ?
    can i install it with license of 2 or 4 cores and upgrade later if needed to 8?
    Is it same software and it depends on the license or i have to install it from start ?
    Thank you in advance
    A newbie lightspeeder :eek:
  10. phattran911

    phattran911 Well-Known Member

    You can use 1 core, 2 core and 4 core license. You don't have to buy 8 core license. The core here means how many cores litespeed will use. If you buy 2 core license, litespeed will use 2 core to run. The six cores left will be saved for mysql, php and others. I am using 1 core and 2 core licenses for my servers which have 4 core CPU. Hope this helps
  11. ESNET

    ESNET Member

    I think you didnt understand me,
    i install lets say today lightspeed, with one cpu licence,
    next month i buy the 8 cpu licence can i place it so all cpus will work ?
  12. phattran911

    phattran911 Well-Known Member

    of course it will work. It will switch the license from 2 core to 8 core. You can ask the staff for more information
  13. ESNET

    ESNET Member

    But i placed this post to ask the stuff :eek:
    Is not the correct place ? :mad:
    Thank you both for your responses
  14. ESNET

    ESNET Member

    BTW what is the LiteSpeed SAPI ?
  15. anewday

    anewday Well-Known Member

    phattran911 is correct. You can upgrade the license whenever. This is the correct place to ask the staff.
  16. ESNET

    ESNET Member

    Anyway i paid and i am still waiting for the licence :(
  17. davidwilsoon

    davidwilsoon New Member

    I have a Dual core Xeon server,using 1 core cpu license of litespeed, holding 1350 low traffic domains. It work great with 1 cpu license.

    The server load is always under 1 around all the day.
  18. ESNET

    ESNET Member

    I have 8 cpu licence with out, i am testing it because i have 4-5 sites from 1k-20k uniques per day with picks 70k uniques.

    wiht out litespeed server was working at 20% with litespeed for 2 cpus dropped at 5-6% and with 8 is at 1-3%
  19. Lauren

    Lauren LiteSpeed Staff Staff Member

  20. Rezaa

    Rezaa Member

    my server load is too high and mysql is using about 50-120% of CPU !!
    Also sometimes I see
     <defunctin process manager that it using alot of cpu too.

    you recommend me to use litespeed?
    is 2core license enough for me?

    My server details:
    Xeon X3440 2.53GHz 8MB Cache
    8GB DDR3 RAM
    Centos 5.5 64bit
    Apache latest version
    Cpanel latest version


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