Hi,
I am planning to install CentOS 6.4 on Dell R720 which has hardware raid card and 6 hard disk slots available.
I have planned with the below set up :-
*2 Hard disks configured in RAID 1 for installing OS * *4 Hard disks configured in RAID 10 for data drive.*
Please suggest and recommend if the above approach is correct and let me know if i am missing anything which is crucial to set up a production server. This server will host MySQL DB server.
Regards,
Kaushal
On Tue, Oct 8, 2013 at 10:55 AM, Kaushal Shriyan kaushalshriyan@gmail.com wrote:
Hi,
I am planning to install CentOS 6.4 on Dell R720 which has hardware raid card and 6 hard disk slots available.
I have planned with the below set up :-
*2 Hard disks configured in RAID 1 for installing OS
What is the HDD size? For a base OS + MySQL server, a 4GB SATA Disk on Module (DoM) may be sufficient.
*4 Hard disks configured in RAID 10 for data drive.*
Again, hopefully, you have sized these disks for sufficient space for the DB files, presuming you will mount this device on /var/lib/mysql.
Please suggest and recommend if the above approach is correct and let me know if i am missing anything which is crucial to set up a production server. This server will host MySQL DB server.
You may want to put /tmp, /var/tmp/, /var/log on separate partitions - 1G, 1G, 3G, respectively. You can "steal" this kind of space by creating a LV on your RAID10 device and carving it up as above with the rest for your MySQL files.
HTH, -- Arun Khan
On 08.10.2013 07:25, Kaushal Shriyan wrote:
Hi,
I am planning to install CentOS 6.4 on Dell R720 which has hardware raid card and 6 hard disk slots available.
I have planned with the below set up :-
*2 Hard disks configured in RAID 1 for installing OS
*4 Hard disks configured in RAID 10 for data drive.*
Please suggest and recommend if the above approach is correct and let me know if i am missing anything which is crucial to set up a production server. This server will host MySQL DB server.
Is there any particular reason why you want to create two RAIDs? Creating one 6 Disk RAID-10 would give you better random IOPS which is useful for a DB System. You can still create two independent virtual disks in that case or use independent partitions/LVM volumes to separate OS from Data.
Regards, Dennis
On Tue, Oct 8, 2013 at 3:45 PM, Dennis Jacobfeuerborn <dennisml@conversis.de
wrote:
On 08.10.2013 07:25, Kaushal Shriyan wrote:
Hi,
I am planning to install CentOS 6.4 on Dell R720 which has hardware raid card and 6 hard disk slots available.
I have planned with the below set up :-
*2 Hard disks configured in RAID 1 for installing OS
*4 Hard disks configured in RAID 10 for data drive.*
Please suggest and recommend if the above approach is correct and let me know if i am missing anything which is crucial to set up a production server. This server will host MySQL DB server.
Is there any particular reason why you want to create two RAIDs? Creating one 6 Disk RAID-10 would give you better random IOPS which is useful for a DB System. You can still create two independent virtual disks in that case or use independent partitions/LVM volumes to separate OS from Data.
Hi Dennis
Thanks for the reply and not sure i understand *"You can still create two independent virtual disks in that case"* Please explain.
Regards,
Kaushal
Greetings,
On Wed, Oct 9, 2013 at 2:09 PM, Kaushal Shriyan kaushalshriyan@gmail.com wrote:
On Tue, Oct 8, 2013 at 3:45 PM, Dennis Jacobfeuerborn <dennisml@conversis.de
wrote:
On 08.10.2013 07:25, Kaushal Shriyan wrote: useful for a DB System. You can still create two independent virtual disks in that case or use independent partitions/LVM volumes to separate OS from Data.
Hi Dennis
Thanks for the reply and not sure i understand *"You can still create two independent virtual disks in that case"* Please explain.
OK, like c: for OS and d: for data
</ducks>
On 09.10.2013 10:39, Kaushal Shriyan wrote:
On Tue, Oct 8, 2013 at 3:45 PM, Dennis Jacobfeuerborn <dennisml@conversis.de
wrote:
On 08.10.2013 07:25, Kaushal Shriyan wrote:
Hi,
I am planning to install CentOS 6.4 on Dell R720 which has hardware raid card and 6 hard disk slots available.
I have planned with the below set up :-
*2 Hard disks configured in RAID 1 for installing OS
*4 Hard disks configured in RAID 10 for data drive.*
Please suggest and recommend if the above approach is correct and let me know if i am missing anything which is crucial to set up a production server. This server will host MySQL DB server.
Is there any particular reason why you want to create two RAIDs? Creating one 6 Disk RAID-10 would give you better random IOPS which is useful for a DB System. You can still create two independent virtual disks in that case or use independent partitions/LVM volumes to separate OS from Data.
Hi Dennis
Thanks for the reply and not sure i understand *"You can still create two independent virtual disks in that case"* Please explain.
Hi Kaushal, I'm not that familiar with the Dell RAID tools but I know the PERC controllers they use are just rebranded LSI controllers. On an LSI controller you can go into the WebBIOS and define your drive configuration (i.e. create a RAID-10 using drivegroups and spans) and then define virtual disks on top of that. For example you can use 6*1TB disks to form a 3TB RAID-10 and then define a 20G virtual disk for the OS and use the remaining space for a data virtual disk.
Back in the days there was no distinction between a RAID and a virtual disk. The RAID *was* the virtual disk. On modern controllers the definition of the RAID topology and the definition of virtual disks on top of that are usually two independent steps.
Regards, Dennis
-
Arun Khan -
Dennis Jacobfeuerborn -
Kaushal Shriyan -
Rajagopal Swaminathan