ReadtTIER - what is it doing? | NETGEAR Communities

Luminary

Sep 06, 2020

Part 1.

Where you see 'Backup: Saved backup job' that is where I edited the source/destination to another backup folder on the remote PC, and at that time I started the backup, which helpfully doesn't get logged.

2020 Aug 26 12:15:15 - Backup: Saved backup job MePC D VMs.
2020 Aug 26 12:57:31 - Volume: Data tier migration started for volume RN316A.
2020 Aug 26 16:05:09 - Backup: Successfully completed backup job MePC D VMs.
2020 Aug 26 16:12:07 - Backup: Saved backup job MePC D VMs.
2020 Aug 26 19:17:23 - Volume: The data on the highest tier is exceeding its capacity for volume RN316A. Data will use the lower tier volume and performance will be impacted.
2020 Aug 26 19:55:58 - Backup: Error backup job MePC D VMs: Failure during copy.
2020 Aug 26 21:00:00 - Volume: Lower tier is now full and the data on the highest tier is not able to migrate the data for volume RN316A. Please upgrade the lower tier capacity to allow migration to continue.
2020 Aug 26 21:57:33 - Volume: Data tier migration started for volume RN316A.
2020 Aug 27 00:35:49 - Volume: Data tier migration completed for volume RN316A.

When I looked at the volume, hovering over the pie-chart to envoke to pop-up*, it showed 9GB (giga) as RG2 Unllocated, but at the top it showed 8TB unallocated. After doing a disk check (Aug 29th-30th), I then did a balance (30th, took 15 min.), which changed RG2 Unallocated to TB's.

Yes I should Balance more often, but why & what did it run out of?

If the 'lower tier is full & the data on the highest tier is not able to migrate' what is it doing 26th 21:57 to 27th 00:35?

Does/should the migration run at higher priority (CPU & IO) to try to be ahead of other activity?

(* is the data in the pop-up available elsewhere, some where that doesn't dissapear every few seconds when the progress bar refreshes?)

Michael_Oz

Luminary

Sep 06, 2020

Part 2.

2020 Aug 26 21:57:33 - Volume: Data tier migration started for volume RN316A.
2020 Aug 27 00:35:49 - Volume: Data tier migration completed for volume RN316A.
2020 Aug 27 03:00:01 - Volume: Data tier migration started for volume RN316A.
2020 Aug 27 03:00:06 - Volume: Data tier migration completed for volume RN316A.
2020 Aug 29 03:00:01 - Volume: Data tier migration started for volume RN316A.
2020 Aug 29 03:00:06 - Volume: Data tier migration completed for volume RN316A.
2020 Aug 29 17:10:08 - Volume: Disk test started for volume RN316A.
2020 Aug 30 09:49:34 - Volume: Disk test completed for volume RN316A.
2020 Aug 30 12:38:11 - Volume: Balance started for volume RN316A.
2020 Aug 30 12:54:19 - Volume: Balance complete for volume RN316A.
2020 Aug 30 12:56:17 - Volume: Defragmentation started for volume RN316A.
2020 Aug 30 18:29:01 - Backup: Successfully completed backup job MePC D VMs.
2020 Aug 31 02:00:01 - Volume: Failed to start data migration for volume RN316A because the volume is already running a defrag.
2020 Aug 31 08:47:55 - Backup: Saved backup job MePC D VMs.
2020 Aug 31 15:06:23 - Backup: Successfully completed backup job MePC D VMs.
2020 Aug 31 15:11:51 - Backup: Saved backup job MePC D VMs.
2020 Aug 31 21:35:24 - Backup: Successfully completed backup job MePC D VMs.
2020 Sep 01 02:00:02 - Volume: Failed to start data migration for volume RN316A because the volume is already running a defrag.
2020 Sep 02 02:00:01 - Volume: Failed to start data migration for volume RN316A because the volume is already running a defrag.
2020 Sep 02 08:10:01 - Volume: Defragmentation complete for volume RN316A.
2020 Sep 02 08:17:37 - Volume: The data on the highest tier is exceeding its capacity for volume RN316A. Data will use the lower tier volume and performance will be impacted.
2020 Sep 02 08:17:42 - Volume: Data tier migration started for volume RN316A.
2020 Sep 02 12:23:26 - Backup: Saved backup job MePC D VMs.
2020 Sep 02 12:32:36 - Volume: Data tier migration completed for volume RN316A.
2020 Sep 02 15:29:14 - Backup: Successfully completed backup job MePC D VMs.
2020 Sep 03 02:00:01 - Volume: Data tier migration started for volume RN316A.
2020 Sep 03 03:36:05 - Volume: Data tier migration completed for volume RN316A.
2020 Sep 04 02:00:01 - Volume: Data tier migration started for volume RN316A.
2020 Sep 04 02:00:06 - Volume: Data tier migration completed for volume RN316A.

After the Balance made TB's available, shortly thereafter I reran the failed backup job.

I then started Defrag. It would be really nice if the Volume info showed Defrag progress and the ability to pause or stop it.

Even better, other tasks pause it for you & restart it. Or it runs for a specified time so you could schedule 'chunks' amoung other maintenance activity.

Part 2B.

2020 Sep 04 02:00:01 - Volume: Data tier migration started for volume RN316A. 
2020 Sep 04 02:00:06 - Volume: Data tier migration completed for volume RN316A.
2020 Sep 04 09:14:32 - Volume: Balance started for volume RN316A.
2020 Sep 04 10:57:35 - Volume: Balance complete for volume RN316A.
2020 Sep 04 11:41:25 - Volume: Defragmentation started for volume RN316A.
2020 Sep 05 02:00:02 - Volume: Failed to start data migration for volume RN316A because the volume is already running a defrag.
2020 Sep 06 01:00:02 - Volume: Failed to start balance for volume RN316A because the volume is already running a defrag.
2020 Sep 06 01:00:07 - Volume: Balance failed to start for volume RN316A.
2020 Sep 06 02:00:02 - Volume: Failed to start data migration for volume RN316A because the volume is already running a defrag.
2020 Sep 06 07:05:07 - Volume: Defragmentation complete for volume RN316A.
2020 Sep 06 07:07:54 - Volume: The data on the highest tier is exceeding its capacity for volume RN316A. Data will use the lower tier volume and performance will be impacted.
2020 Sep 06 07:07:57 - Volume: Data tier migration started for volume RN316A.
2020 Sep 06 11:17:45 - Volume: Data tier migration completed for volume RN316A.

02:00:06 The high tier is empty.

07:05:07 Defrag complete.

Then it spends 4 hours migrating.

So it seems Defrag fills the high tier. I presume migration then fragments it again.

Isn't that beside the point.

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