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Hi Brian,<br><br>
Thank you for your reply. I inserted my comment into your lines. please
refer it.<br><br>
At 09/01/30（金）04:36, Brian J. Murrell wrote:<br>
<blockquote type=cite>On Thu, 2009-01-29 at 13:32 +0900, Satoshi Isono
wrote:<br>
> Hi all,<br>
> <br>
> Do you know how to change the capacity of inode space?<br><br>
Sorry, you can't. Up-front planning is very important in this
aspect of<br>
deploying Lustre. In the future, adding MDTs will increase
inode<br>
capacity, but currently only a single MDT is supported.</blockquote><br>
Current Lustre version is NOT able to multiple MDT. Is it right? I found
the article in Lustre FAQ.<br><br>
<a href="http://wiki.lustre.org/index.php?title=Lustre_FAQ">
http://wiki.lustre.org/index.php?title=Lustre_FAQ</a><br>
* What is the maximum number of files in a single file
system? In a single directory? <br><br>
So, if we use current Lustre 1.6.x on EXT3, we can only support single
MDT. Then, according to the limitation of the number of inodes, we are
able to use inodes up to 4 billion. This means that a Lustre consisted on
EXT3 can support 4 million files. Is it correct?<br><br>
<blockquote type=cite>I *think* growing the size of the physical device
and then using<br>
resize2fs to increase an ext3(4?) filesystem will increase inode
count.<br>
I am however, doubtful that resize2fs will work with our ldiskfs<br>
filesystems. Perhaps resize2fs from an ext4 supporting version
of<br>
e2fsprogs will support doing that. I have no idea -- never tried
it.</blockquote><br>
Another question to you, When changing #inodes into maximum number, are
there any demerit/un-merit points? I want to know the tradeoff changing
#inodes. In my site, the total OST capacity is 800TB and size of MDT is
123207680 (123 million). What do you think about the number of inodes
which I will change?<br><br>
<blockquote type=cite>That said, doing this is a completely unsupported
operation. I don't<br>
know anyone that has even tried it. If you want to go this route,
do a<br>
lot of testing and make sure you have backups.<br><br>
It will probably be easier and cheaper in the long run to just build
a<br>
new MDT that meets your revised requirements.</blockquote><br>
I understand. Of course, I am going to choose more safety way to change
#inodes.<br><br>
I appreciate your advice.<br>
Satoshi Isono<br><br>
<br>
<blockquote type=cite>b.<br><br>
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