<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Just so your aware, the21057 bugzilla's assignment yesterday was as follows. Who can I get to move this forward so that I can <div>exchange messages with someone.<br><div><br></div><div><span class="Apple-style-span" style="font-family: sans-serif; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "></span><legend>People</legend><table cellpadding="1" cellspacing="1" style="position: static; z-index: auto; "><tbody><tr><td align="right"><b>Reporter</b>:</td><td><a href="mailto:pravin.shelar@sun.com" style="color: rgb(0, 51, 153); ">pravin shelar <pravin.shelar@sun.com></a></td></tr><tr><td align="right"><b><a href="https://bugzilla.lustre.org/page.cgi?id=fields.html#assigned_to" style="color: rgb(0, 51, 153); ">Assigned To</a></b>:</td><td><a href="mailto:pravin.shelar@sun.com" style="color: rgb(0, 51, 153); ">pravin shelar <pravin.shelar@sun.com></a></td></tr><tr><td align="right" valign="top"><label for="newcc" accesskey="a"><b><u>A</u>dd CC</b></label>:</td><td><input name="newcc" value="" size="30" id="newcc"></td></tr><tr><td align="right" valign="top"><label for="cc"><b>CC</b></label>:</td><td valign="top"><select id="cc" name="cc" multiple="multiple" size="5"> <option value="robert.read@sun.com"><a href="mailto:robert.read@sun.com">robert.read@sun.com</a></option> </select> <br><input type="checkbox" id="removecc" name="removecc"><label for="removecc">Remove selected CCs</label> </td></tr></tbody></table><div><div>On Oct 16, 2009, at 8:49 AM, Maxim V. Patlasov wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div bgcolor="#ffffff" text="#000000"> Eric,<br> <br> To make things 100% clear - did you answer positively ('It should...') because there are some lustre use-cases for such transfers or just because it would be natural for LNET to support both aligned and not-aligned big bulk transfers?<br> <br> Thanks in advance,<br> Maxim<br> <br> On 10/14/2009 09:22 PM, Eric Barton wrote: <blockquote cite="mid:088e01ca4cf2$f5f9dcf0$e1ed96d0$@com" type="cite"> <pre wrap="">Maxim,
It should support such transfers, but you have to be careful about
the number of fragments this can introduce. This issue has already
been observed in routers, which buffer LNET message payloads at
the same page offset, irrespective of the sender's page offset (of
which it has no knowledge). For example, this can force the o2iblnd,
if configured to pre-map all memory, to need double the number of RDMA
fragments and therefore fail the transfer. Chat with Liang - he knows
all about this...
Cheers,
Eric
</pre> <blockquote type="cite"> <pre wrap="">-----Original Message-----
From: <a class="moz-txt-link-abbreviated" href="mailto:lustre-devel-bounces@lists.lustre.org">lustre-devel-bounces@lists.lustre.org</a> [<a class="moz-txt-link-freetext" href="mailto:lustre-devel-bounces@lists.lustre.org">mailto:lustre-devel-bounces@lists.lustre.org</a>] On Behalf Of Maxim V.
Patlasov
Sent: 14 October 2009 8:23 AM
To: <a class="moz-txt-link-abbreviated" href="mailto:lustre-devel@lists.lustre.org">lustre-devel@lists.lustre.org</a>
Subject: [Lustre-devel] lustre-to-LNET API: big non-aligned bulk transfers
Hi lustre-devel,
I'd like to gather some opinions about the following question:
Is it allowed or possible for lustre to submit relatively big bulk
transfer request (e.g. >512K) to LNET layer when offset in the very
first page to fetch bulk data from (on sender side) is not equal to the
offset in the very first page to store data (on receiver side)? In the
other words - should LNET support such transfers?
Thanks in advance,
Maxim
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</pre> </blockquote> <pre wrap=""><!---->
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