topic Re: quotas query in Operating System - HP-UX

quotas query

xcvzxvzxdv — Wed, 03 May 2006 02:31:48 GMT

Hi I have a query , I am setting the quotas for the users .

fs /user06 blocks (soft = 0, hard = 0) inodes (soft = 0, hard = 2)

In I need to ask what are blocks and what are inodes , how do i define space for the users based on them

Re: quotas query

Peter Godron — Wed, 03 May 2006 02:41:42 GMT

Hi,
if you do:
man 5 quota
you should get a basic understanding of the quota system.

default block size is 1k
inodes are internal 'file pointers'

Re: quotas query

Senthil Kumar .A_1 — Wed, 03 May 2006 02:58:29 GMT

Blocks - are the chunk of bytes where the actual content of a file or directory is stored.

Inodes - are the FS metadata structure where the characteristics of the file are stored. e.g. size, address of data blocks define above, permission, number of links, uid, gid, modified time, accessed time etc... this is the info ls command spits out when used with "-l" option. Basically it is using "fstat()" and "stat()" system call to fetch the inode details.

To see the contents of the inode try ...

man fstat and see how the structure "struct stat" is defined to get an idea of inode.

If you want to know more of quota, please refer the man page of quota as peter suggested.

Regards,
Senthil Kumar .A

Re: quotas query

xcvzxvzxdv — Wed, 03 May 2006 06:36:36 GMT

I want to ask how do I calculate the user space with blocks. Suppose if I am allocating 10000 blocks how much space am I allocating

Re: quotas query

Peter Godron — Wed, 03 May 2006 06:43:07 GMT

Hi,
As each block is 1K => 10000K

Re: quotas query

Senthil Kumar .A_1 — Wed, 03 May 2006 06:44:22 GMT

Hi,

Let us assume you want to set quota on /dev/vg01/lvol5. Now check the block size of the file system with the below command.

fstyp -v /dev/vg01/lvol5

in my case it is "f_bsize: 8192" meaning 8 KB.

So if i were to allocate 10000 such blocks then I would effectively allocated approx : 80MB

Regards,
Senthil Kumar .A

Re: quotas query

Ninad_1 — Wed, 03 May 2006 06:54:15 GMT

Hi,

I think what Peter is saying is correct - the block size is in 1k blocks.
Please refer man page of quota(5)
man 5 quota

regards,
Ninad

Re: quotas query

xcvzxvzxdv — Wed, 03 May 2006 07:26:43 GMT

the f size is f_size: 1048576

this is a preety large value =1024 MB am I correct

Re: quotas query

Peter Godron — Fri, 05 May 2006 03:52:46 GMT

Hi,
I did a quick test on my system and it appears the unit is 1K.

You seem to have quite a few questions open.
Can you please review the solutions given, award points and close the threads.

Re: quotas query

Ninad_1 — Fri, 05 May 2006 04:06:03 GMT

Hi,

What do you mean 1024MB is a pretty large value - its the filesystem size you are pointing out at ? Nowadays filesystems can be prety huge - even 50-100GB . Size is relative - and depends on for which application/what purpose the filesystem is allocated.
Now if you are talking about if quota is 1024MB its a huge figure then you may be right, but again as I said its relative and depends on purpose. So you are the best judge for your set of environment to decide whats a large size for quota for a particular user.

Again -would like to highlight that the f_size is not quota but your filesystem size.

Regards,
Ninad

Re: quotas query

Senthil Kumar .A_1 — Fri, 05 May 2006 04:21:18 GMT

Hi,

In my previous query I asked you to check f_bsize for block size, not f_size. Please reconfirm once again.

Please recheck.

Regards,
Senthil Kumar .A

Re: quotas query

xcvzxvzxdv — Fri, 05 May 2006 05:31:31 GMT

thanks senthil in my case also it is 8192

Re: quotas query

Peter Godron — Fri, 05 May 2006 05:40:46 GMT

I do not think the f_bsize has any impact on the quota system, as this based around 1K blocks.

So regardless of what f_bsize is, a block quota of 10000 is 10000K.

Please read:
man 5 quota
man 1m edquota