<div dir="ltr"><div>Hi,</div><div><br></div><div>i would start doing some checks like: "(Input/output error)" seems returned by the operating system, this happens for instance trying
to access a file system which is on a device not available so i
would check the network connectivity between the client to servers and server to server during the
reported time. <br></div><div><br></div><div>Regards</div><div>Davide<br></div></div><br><div class="gmail_quote"><div dir="ltr">On Sun, Jan 6, 2019 at 3:32 AM Raghavendra Gowdappa <<a href="mailto:rgowdapp@redhat.com">rgowdapp@redhat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr">On Sun, Jan 6, 2019 at 7:58 AM Raghavendra Gowdappa <<a href="mailto:rgowdapp@redhat.com" target="_blank">rgowdapp@redhat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr">On Sun, Jan 6, 2019 at 4:19 AM Matt Waymack <<a href="mailto:mwaymack@nsgdv.com" target="_blank">mwaymack@nsgdv.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div id="gmail-m_-8138506196405553470gmail-m_6692858748533838528gmail-m_-506362477572935915divtagdefaultwrapper" style="font-size:12pt;color:rgb(0,0,0);background-color:rgb(255,255,255);font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi all,</p>
<p><br>
</p>
<p>I'm having a problem writing to our volume. When writing files larger than about 2GB, I get an intermittent issue where the write will fail and return Input/Output error. This is also shown in the FUSE log of the client (this is affecting all clients).
A snip of a client log is below:</p>
<p>[2019-01-05 22:39:44.581371] W [fuse-bridge.c:2474:fuse_writev_cbk] 0-glusterfs-fuse: 51040978: WRITE => -1 gfid=82a0b5c4-7ef3-43c2-ad86-41e16673d7c2 fd=0x7f949839a368 (Input/output error)</p>
<p>[2019-01-05 22:39:44.598392] W [fuse-bridge.c:1441:fuse_err_cbk] 0-glusterfs-fuse: 51040979: FLUSH() ERR => -1 (Input/output error)</p>
<p>[2019-01-05 22:39:47.420920] W [fuse-bridge.c:2474:fuse_writev_cbk] 0-glusterfs-fuse: 51041266: WRITE => -1 gfid=0e8e1e13-97a5-478a-bc58-e81ddf3698a3 fd=0x7f949809b7f8 (Input/output error)</p>
<p>[2019-01-05 22:39:47.433377] W [fuse-bridge.c:1441:fuse_err_cbk] 0-glusterfs-fuse: 51041267: FLUSH() ERR => -1 (Input/output error)</p>
<p>[2019-01-05 22:39:50.441531] W [fuse-bridge.c:2474:fuse_writev_cbk] 0-glusterfs-fuse: 51041548: WRITE => -1 gfid=0e8e1e13-97a5-478a-bc58-e81ddf3698a3 fd=0x7f949839a368 (Input/output error)</p>
<p>[2019-01-05 22:39:50.451914] W [fuse-bridge.c:1441:fuse_err_cbk] 0-glusterfs-fuse: 51041549: FLUSH() ERR => -1 (Input/output error)</p>
<p>The message "W [MSGID: 109011] [dht-layout.c:163:dht_layout_search] 0-gv1-dht: no subvolume for hash (value) = 1311504267" repeated 1721 times between [2019-01-05 22:39:33.906241] and [2019-01-05 22:39:44.598371]</p>
<p>The message "E [MSGID: 101046] [dht-common.c:1502:dht_lookup_dir_cbk] 0-gv1-dht: dict is null" repeated 1714 times between [2019-01-05 22:39:33.925981] and [2019-01-05 22:39:50.451862]</p>
<p>The message "W [MSGID: 109011] [dht-layout.c:163:dht_layout_search] 0-gv1-dht: no subvolume for hash (value) = 1137142622" repeated 1707 times between [2019-01-05 22:39:39.636552] and [2019-01-05 22:39:50.451895]</p></div></div></blockquote><div><br></div><div>This looks to be a DHT issue. Some questions:<br></div><div>* Are all subvolumes of DHT up and client is connected to them? Particularly the subvolume which contains the file in question.<br></div><div>* Can you get all extended attributes of parent directory of the file from all bricks?<br></div><div>* set diagnostics.client-log-level to TRACE, capture these errors again and attach the client log file.<br></div></div></div></blockquote><div><br></div><div>I spoke a bit early. dht_writev doesn't search hashed subvolume as its already been looked up in lookup. So, these msgs looks to be of a different issue - not writev failure.<br><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div id="gmail-m_-8138506196405553470gmail-m_6692858748533838528gmail-m_-506362477572935915divtagdefaultwrapper" style="font-size:12pt;color:rgb(0,0,0);background-color:rgb(255,255,255);font-family:Calibri,Arial,Helvetica,sans-serif">
<div><br>
</div>
<div>This is intermittent for most files, but eventually if a file is large enough it will not write. The workflow is SFTP tot he client which then writes to the volume over FUSE. When files get to a certain point,w e can no longer write to them. The file
sizes are different as well, so it's not like they all get to the same size and just stop either. I've ruled out a free space issue, our files at their largest are only a few hundred GB and we have tens of terrabytes free on each brick. We are also sharding
at 1GB.</div>
<div><br>
</div>
<div>I'm not sure where to go from here as the error seems vague and I can only see it on the client log. I'm not seeing these errors on the nodes themselves. This is also seen if I mount the volume via FUSE on any of the nodes as well and it is only reflected
in the FUSE log.</div>
<div><br>
</div>
<div>Here is the volume info:</div>
<div>
<div>Volume Name: gv1</div>
<div>Type: Distributed-Replicate</div>
<div>Volume ID: 1472cc78-e2a0-4c3f-9571-dab840239b3c</div>
<div>Status: Started</div>
<div>Snapshot Count: 0</div>
<div>Number of Bricks: 8 x (2 + 1) = 24</div>
<div>Transport-type: tcp</div>
<div>Bricks:</div>
<div>Brick1: tpc-glus4:/exp/b1/gv1</div>
<div>Brick2: tpc-glus2:/exp/b1/gv1</div>
<div>Brick3: tpc-arbiter1:/exp/b1/gv1 (arbiter)</div>
<div>Brick4: tpc-glus2:/exp/b2/gv1</div>
<div>Brick5: tpc-glus4:/exp/b2/gv1</div>
<div>Brick6: tpc-arbiter1:/exp/b2/gv1 (arbiter)</div>
<div>Brick7: tpc-glus4:/exp/b3/gv1</div>
<div>Brick8: tpc-glus2:/exp/b3/gv1</div>
<div>Brick9: tpc-arbiter1:/exp/b3/gv1 (arbiter)</div>
<div>Brick10: tpc-glus4:/exp/b4/gv1</div>
<div>Brick11: tpc-glus2:/exp/b4/gv1</div>
<div>Brick12: tpc-arbiter1:/exp/b4/gv1 (arbiter)</div>
<div>Brick13: tpc-glus1:/exp/b5/gv1</div>
<div>Brick14: tpc-glus3:/exp/b5/gv1</div>
<div>Brick15: tpc-arbiter2:/exp/b5/gv1 (arbiter)</div>
<div>Brick16: tpc-glus1:/exp/b6/gv1</div>
<div>Brick17: tpc-glus3:/exp/b6/gv1</div>
<div>Brick18: tpc-arbiter2:/exp/b6/gv1 (arbiter)</div>
<div>Brick19: tpc-glus1:/exp/b7/gv1</div>
<div>Brick20: tpc-glus3:/exp/b7/gv1</div>
<div>Brick21: tpc-arbiter2:/exp/b7/gv1 (arbiter)</div>
<div>Brick22: tpc-glus1:/exp/b8/gv1</div>
<div>Brick23: tpc-glus3:/exp/b8/gv1</div>
<div>Brick24: tpc-arbiter2:/exp/b8/gv1 (arbiter)</div>
<div>Options Reconfigured:</div>
<div>performance.cache-samba-metadata: on</div>
<div>performance.cache-invalidation: off</div>
<div>features.shard-block-size: 1000MB</div>
<div>features.shard: on</div>
<div>transport.address-family: inet</div>
<div>nfs.disable: on</div>
<div>cluster.lookup-optimize: on</div>
</div>
<div><br>
</div>
<div>I'm a bit stumped on this, any help is appreciated. Thank you!</div>
<p><br>
</p>
</div>
</div>
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