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Problem with mtree and directory structure
Hello all,
I've two DD640, both configured equal. They have one MTree /data/col1/backup and this one as two subfolders "dd1" and "dd2". These folders are shared by CIFS under the same name:
\\dd1\dd1\ -> Storage for Networker at location 1
\\dd1\dd2\ -> CIFS replication target for DD2
\\dd2\dd1\ -> CIFS replication target for DD1
\\dd2\dd1\ -> Storage for Networker at location 2
Now I want to migrate from CIFS to MTree replication. But as I learned, I can't create MTree /data/col1/backup/dd1 and /data/col1/backup/dd2.
So my idea was do create two new MTrees /data/col1/dd1 and /data/col1/dd2.
But the question is: how could I move the existing data from /data/col1/backup/dd1 to /data/col1/dd1 (and of course the same for dd2)? I could not find any why to move files localy. And I think to move them via CIFS is very inefficient.
Any idea?
Greetings,
Dennis
Anonymous
5 Practitioner
5 Practitioner
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274.2K Posts
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August 20th, 2018 08:00
Dennis,
There's a command (via Putty or another SSH tool) on the Data Domain called "Fastcopy". You simply issue the command "filesys fastcopy source /data/col1/backup/dd1 destination /data/col1/my_new_mtree/dd2 -- this will make a copy "on the system" of the DD1 folder and place a copy under your "my_new_mtree". The great part is -- it's all deduplicated - so it'll take up VERY LITTLE space because it's just a bunch of pointers. Hope this helps...
-Brian
DennisHueckelhe
9 Posts
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August 21st, 2018 22:00
Hi Brian,
yes, that worked out great
Even if the data are duplicated and copying of ~6TB was very fast (took only 13 secs
), it's a realy copy and I can safely delete the old "source" MTree, right?
Anonymous
5 Practitioner
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274.2K Posts
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August 22nd, 2018 08:00
That's correct. If you do an 'mtree list' on the putty screen -- you should see your mtrees pretty much identical. There may be a small discrepancy because there are some hidden snapshots from the fastcopy -- but you should see the size just about identical. Personally, i like to do a directory listing from another host of the two locations and match the number of files and sizes.
Glad this helped!
-Brian
DennisHueckelhe
9 Posts
0
August 23rd, 2018 23:00
Perfect, it works
Only the initialization of the new created replcation is very slow. After around 24h:
With this speed it will take up to ~ 1 month to complete replication