Incremental Migration - Stats.

[cyber7]

Good morning everyone.

I am busy doing a migration from Zimbra 8.0.7 to Zimbra 8.7.11.

Current Stats as of 27/06/2017 08:53:

• Smart Scan Started: 20/06/2017 08:20:08
• Accounts scanned: 244/327
• Account updated/new: 0/247
• Item scanned: 6133816
• Item updated/new/unique: 0/6123193/4965854

Current Server Stats:

• STORE0: /opt/zimbra/store: 1.6T
• STORE1: /opt/zimbra2: 519G
• MIGRATION: /migrate: 493G

So, after 7 days (168 hours), my first scan is 3/4 way through my accounts.

Is this correct? It seems like an awful amount of time spent to do the first step in the migration. My scenario/implementation of mail can not be even close to being a big one with only 327 accounts? Is this typical and normal for a smart scan?

I will keep this updated as I proceed.

kind regards
Aubrey Kloppers, Cape Town, South Africa

[cyber7]

Finally completed:
Operation Duration: 8 days, 10 hours, 39 minutes, 54 seconds

- stats -

• new accounts: 327
• accounts updated: 0
• skipped accounts(by COS): 0
• item updated: 0
• new metadata: 7295842
• new files: 5851997
• checked items: 7327066
• backup path: /migrate
• skipped items: 0
• I/O read exception: 0
• num skipped files: 2
• items/sec: 10

[larcara]

Hi, Cyber7!

10 Items/sec is a very low value...
In your case the main bottleneck should be caused by I/O throughput: can you please tell me what's your setup? Is a physical or virtual environment (and is there a snapshot active)?

It could be useful some performance statistics, like

dd if=/dev/zero of=/migrate/testfile bs=512 count=1000

dd if=/dev/zero of=/migrate/testfile bs=1G count=1

and

iostat -xm10

(lauch as root, while smart scan is running)

Feel free to share your results here or open a Tech Support request at Zextras Support Portal!

Have a nice day,
Luca

[cyber7]

Hi larcara
It is a bit behind - I have completed the initial dump and is busy with the restore.

After getting a log of UNKNOWNFOLDERS I deleted all my accounts, went back to the old server and ran:
zxsuite backup dosmartscan deep true

and started the restore again. It seems my UNKNOWNFOLDERS problem was rectified.