I have my own, high-performance, network-data-copy utility:
http://www.sandia.gov/MPSCP/mpscp_design.htm
I introduced sendfile last spring, to transfer files from an LFS on a
Cray XT3, and also a full, Linux cluster. Initially it worked exactly
per the man page description. I don't know our levels, but I can get
them if you are interested. In the last few months, we went through some
upgrades. When I went back to the binary that had worked before, it
crashed. I jacked with the sendfile code, and found an irregular
workaround, which appears to give better performance than standard posix
read and write. I'm conducting further testing right now.
Marty Barnaby
[EMAIL PROTECTED] wrote:
so i did, the patches was half a year old atleast, mostly for
development versions, ill make a non-VS kernel later to test it, also
will prolly do non lustre one and use VS from local hd for another test,
but in the worst case it can be connected to both (it works on
non-lustre patched 2.6.15 with older VS ptach)
Konrad Gutkowski
----- Original Message ----- From: "Alexey Lyashkov"
<[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Wednesday, November 01, 2006 8:14 PM
Subject: Re: [Lustre-discuss] Lustre breaking sendfile functionality
how i remember vserver has many sendfile issues.
look into vserver mail archive to corresponding patches.
В Срд, 01.11.2006, в 18:59, [EMAIL PROTECTED] пишет:
Recently i hit a bug with lustre and apache/vsftpd (using sendfile)
symptoms are :
kernel 2.6.12.6 and lustre 1.5.95 and vserver patch for 2.6.12
- from inside a vserver i get only first ~114kb of any file when
files are
stored on lustre
- from outside of a vserver i get whole file when they are stored on
local
fs
kernel 2.6.18.1 and lustre 1.5.95 and vserver patch for 2.6.18
- from inside of a vserver i get first ~64kb of any file when files are
stored on lustre
- from outside of a vserver i get whole file (same size) but
transmission
ends with an error (tested on vsftp server and windows client) when
files
are stored on lustre
- when files are stored on local fs it works fine
TIA
Konrad Gutkowski
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