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Vxfs and Intentlog

 
Sagar Sirdesai
Trusted Contributor

Vxfs and Intentlog

Hi
I'm trying understand what is a intentlog.
Does intentlog contains all the information of changes intended to the super block.
5 REPLIES
Mel Burslan
Honored Contributor

Re: Vxfs and Intentlog

Have you tried googling it ??

http://www.google.com/search?q=vxfs+what+is+intentlog

the first link google brings up, tells you pretty much what you need to know:

http://sfdoccentral.symantec.com/sf/5.1/aix/html/vxfs_admin/ch01s02s03s01.htm
________________________________
UNIX because I majored in cryptology...
P Arumugavel
Respected Contributor

Re: Vxfs and Intentlog

Sagar Sirdesai
Trusted Contributor

Re: Vxfs and Intentlog

is intentlog memory based or disk based.

Mel Burslan
Honored Contributor

Re: Vxfs and Intentlog

Is this a homework question ? If it is memory based and your computer crashed, how is the intentlog be useful to you ? Just think about it for a minute, huh ?
________________________________
UNIX because I majored in cryptology...
Ismail Azad
Esteemed Contributor

Re: Vxfs and Intentlog

Hi sagar,

Pending metadata transaction is the terminology you are looking for. When your system crashes, intent log allows for "fast file system recovery" which was the major drawback of the HFS filesystem which did not maintain file system integrity after an outage.

Sometimes on an HFS filesystem, the whole data has to be recovered from tape. Vxfs or JFS where J refers to the journal or the intent log avoids such difficult situations and can be extremely useful at times of power outages. The intent log is also referred to as a "circular log".

Regards
Ismail Azad
Read, read and read... Then read again until you read "between the lines".....