topic Re: DC migration. in Operating System - HP-UX

DC migration.

himacs — Tue, 01 Feb 2011 12:18:20 GMT

Hi Admins,

We have DR migration activity scheduled coming week.All the DBs ,apps will be starting in DR,similar to Production boxes.

Now i want to compare 2 mount points including the sub directories.If any directory not available in DR similar to prod, we have to create it.

Please let me know the simplest way to compare 2 mount points including sub directories.

Regards
himacs

Re: DC migration.

Jose Mosquera — Tue, 01 Feb 2011 12:40:04 GMT

Hi,

If mount points belong to same server you can use dircmp command.
To compare the two directories /slate and /sleet and produce a list ofchanges that would make the directories identical:
#dircmp -d /slate /sleet

To extra info:
#man dircmp

Rgds

Re: DC migration.

James R. Ferguson — Tue, 01 Feb 2011 14:22:30 GMT

Hi:

You don't offer the mechanism by which you will replicate data ('cp', 'cpio', 'tar', pax', 'fbackup', LVM mirroring, etc.

That said:

Should you wish to further compare *directory* sizes, don't.

The size of directories on your source system may be larger than the destination system. This is quite normal. Disk blocks allocated to directories are not deleted when the file metadata they contain is removed because the corresponding file is removed.

As for the sizes of individual files, beware comparing those too. Sparse files may be "inflated" depending on the copy mechanism you use. The 'cksum' will not change, though.

The 'dircmp' comparison suggested by Jose is a good check.

Regards!

...JRF...

Re: DC migration.

himacs — Tue, 01 Feb 2011 14:41:13 GMT

Hi Admins,

Thanks for the responses.

Actually i don mind about size.

I want any clue for a script that lists only directories under mount point.if there are sub directories script should give absolute path also.

Regards
himacs

Re: DC migration.

Zinky — Tue, 01 Feb 2011 14:41:22 GMT

A DR Strategy that involves comparing directory structures is at best indicative of flawed and poor procedures and processes in place.

Directory comparison tools work very slow. Besides - if it were a REAL disaster - you would not have PROD to compare with - don't you?

Best Practice is to ensure your BACKUPS are good and current so whatever you need to re-CREATE at DR is complete -- no asking if all dirs and subdirs, etc have been created.

Cheers

Re: DC migration.

Jose Mosquera — Tue, 01 Feb 2011 16:07:12 GMT

Hi,

To see a directory tree from /mount_point:
#find /mount_point -type d -exec ls -d {} \;

or with extended ls -l command format:
#find /mount_point -type d -exec ls -ld {} \;

Rgds.

Re: DC migration.

himacs — Fri, 04 Feb 2011 14:53:52 GMT

useful thread.Thanks to all

Regards
himacs