Need data on disk drive management by OS: getting base I/O unit size, “sync” option, Direct Memory A

Posted by Richard T on Super User See other posts from Super User or by Richard T
Published on 2010-03-31T21:38:43Z Indexed on 2010/03/31 21:43 UTC
Read the original article Hit count: 174

Filed under:

database

|

disk

|

io

|

settings

Hello All,

I want to ensure I have done all I can to configure a system's disks for serious database use. The three areas I know of (any others?) to be concerned about are:

I/O size: the database engine and disk's native size should either match, or the database's native I/O size should be a multiple of the disk's native I/O size.
Disks that are capable of Direct Memory Access (eg. IDE) should be configured for it.
When a disk says it has written data persistently, it must be so! No keeping it in cache and lying about it.

I have been looking for information on how to ensure these are so for CENTOS and Ubuntu, but can't seem to find anything at all!

I want to be able to check these things and change them if needed.

Any and all input appreciated.

© Super User or respective owner

Need data on disk drive management by OS: getting base I/O unit size, “sync” option, Direct Memory A

Posted by Richard T on Stack Overflow See other posts from Stack Overflow or by Richard T
Published on 2010-03-31T21:37:42Z Indexed on 2010/03/31 21:43 UTC
Read the original article Hit count: 174

Filed under:

database

|

disk

|

io

|

settings

Hello All,

I want to ensure I have done all I can to configure a system's disks for serious database use. The three areas I know of (any others?) to be concerned about are:

I/O size: the database engine and disk's native size should either match, or the database's native I/O size should be a multiple of the disk's native I/O size.
Disks that are capable of Direct Memory Access (eg. IDE) should be configured for it.
When a disk says it has written data persistently, it must be so! No keeping it in cache and lying about it.

I have been looking for information on how to ensure these are so for CENTOS and Ubuntu, but can't seem to find anything at all!

I want to be able to check these things and change them if needed.

Any and all input appreciated.

© Stack Overflow or respective owner

Related posts about database

SQL SERVER Retrieve and Explore Database Backup without Restoring Database Idera virtual database

as seen on Dot net Slackers - Search for 'Dot net Slackers'
I recently downloaded Ideras SQL virtual database, and tested it. There are a few things about this tool which caught my attention.My ScenarioIt is quite common in real life that sometimes observing or retrieving older data is necessary; however, it had changed as time passed by. The full database… >>> More
Cloning A Database On The Same Server Using Rman Duplicate From Active Database

as seen on Oracle Blogs - Search for 'Oracle Blogs'
To clone a database using Rman we used to require an existing Rman backup, on 11g we can clone databases using the "from active" database option. In this case we do not require an existing backup, the active datafiles will be used as the source for the clone. In order to clone with the source database… >>> More
cPickle ImportError: No module named multiarray

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I'm using cPickle to save my Database into file. The code looks like that: def Save_DataBase(): import cPickle from scipy import * from numpy import * a=Results.VersionName #filename='D:/results/'+a[a.find('/')+1:-a.find('/')-2]+Results.AssType[:3]+str(random.randint(0,100))+Results.Distribution+"… >>> More
SQL SERVER – 2008 – Introduction to Snapshot Database – Restore From Snapshot

as seen on SQL Authority - Search for 'SQL Authority'
Snapshot database is one of the most interesting concepts that I have used at some places recently. Here is a quick definition of the subject from Book On Line: A Database Snapshot is a read-only, static view of a database (the source database). Multiple snapshots can exist on a source database and… >>> More
OTN ???? ?????? ???????

as seen on Oracle Blogs - Search for 'Oracle Blogs'
Database ?? Database ??????? Database ?????????? Java WebLogic Server/????????·???? SOA/BPM/????? ???????/???? ID??/?????? ?????EPM/BI EPM/BI ??????? EPM/BI ???? OS/??? ???? ????? MySQL Database ?? ???? ?? ????????? ??? ?? ORACLE MASTER… >>> More

Related posts about disk

?11gR2 RAC???ASM DISK Path????

as seen on Oracle Blogs - Search for 'Oracle Blogs'
????T.askmaclean.com???????11gR2?ASM DISK?????,??????: aix 6.1,grid 11.2.0.3+asm11.2.0.3+rac ???????????aix????????mpio,??diskgroup ?????veritas dmp???,?????asm?disk_strings=/dev/vx/rdmp/*,crs/asm??????????????/dev/vx/rdmp/?????,?????????diskgroup??? crs???????:2012-07-13… >>> More
?11gR2 RAC???ASM DISK Path????

as seen on Oracle Blogs - Search for 'Oracle Blogs'
????T.askmaclean.com???????11gR2?ASM DISK?????,??????: aix 6.1,grid 11.2.0.3+asm11.2.0.3+rac ???????????aix????????mpio,??diskgroup ?????veritas dmp???,?????asm?disk_strings=/dev/vx/rdmp/*,crs/asm??????????????/dev/vx/rdmp/?????,?????????diskgroup??? crs???????:2012-07-13… >>> More
Time machine disk icon on boot disk

as seen on Super User - Search for 'Super User'
The icon for Macintosh HD (my boot disk) shows as a Time Machine disk. There is a file .com.apple.timemachine.supported in the root of the disk. If I delete the file and restart the computer, the icon goes back to a normal HD icon. However, the .com.apple.timemachine.supported file is recreated at… >>> More
Use hard disk image like a regular hard disk on Linux

as seen on Super User - Search for 'Super User'
If you have a hard disk image (including partition table, multiple partitions,...), is it possible to let Linux treat it as a regular hard disk? By "regular hard disk" I mean I would like to have the image show up as, for instance, /dev/hdx and its partitions as /dev/hdx1,... (I know I can mount… >>> More
Windows 7 detects my 1 TB disk as a disk with only 31 MB space

as seen on Super User - Search for 'Super User'
I've added another 1 TB Western Digital disk on my computer (there is a disk with 250 GB already), and after booting to Windows 7, it recognise the disk, but in the Disk Management panel, it says the disk has only 31 MB TOTAL space, so is what it shows in the EVEREST information. And when I rebooted… >>> More