<div dir="ltr">It turns out that the read eventually finished and was 1/10th of the performance that I was expecting. <div><br></div><div>As ost idx 1 is unavailable, the client read has to timeout on ost idx 1 and then will read from ost idx 7. This happens for each 1MB block, as I am using that as the block size. </div><div><br></div><div>Is there a tunable to avoid this issue?</div><div><br></div><div>lfs check osts also takes about 30 seconds as it times out on the unavailable OST. </div><div><br></div><div>Due to this issue, I am virtually unable to use the mirroring feature. </div><div><br></div><div>I</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, May 19, 2019 at 4:27 PM John Doe <<a href="mailto:ace629426@gmail.com" target="_blank">ace629426@gmail.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">After mirroring a file , when one mirror is down, any reads from a client just hangs. Both server and client are running latest 2.12.1-1. Client waits for ost idx 1 to come back online. I am only unmounting ost idx1 not ost idx 7.<div><br></div><div>Has anyone tried this feature? </div><div><br></div><div>Thanks,</div><div>John.<br><div><br></div><div>lfs getstripe mirror10<br>mirror10<br> lcm_layout_gen: 5<br> lcm_mirror_count: 2<br> lcm_entry_count: 2<br> lcme_id: 65537<br> lcme_mirror_id: 1<br> lcme_flags: init<br> lcme_extent.e_start: 0<br> lcme_extent.e_end: EOF<br> lmm_stripe_count: 1<br> lmm_stripe_size: 1048576<br> lmm_pattern: raid0<br> lmm_layout_gen: 0<br> lmm_stripe_offset: 1<br> lmm_pool: 01<br> lmm_objects:<br> - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x280a8:0x0] }<br><br> lcme_id: 131074<br> lcme_mirror_id: 2<br> lcme_flags: init<br> lcme_extent.e_start: 0<br> lcme_extent.e_end: EOF<br> lmm_stripe_count: 1<br> lmm_stripe_size: 1048576<br> lmm_pattern: raid0<br> lmm_layout_gen: 0<br> lmm_stripe_offset: 7<br> lmm_pool: 02<br> lmm_objects:<br> - 0: { l_ost_idx: 7, l_fid: [0x100070000:0x28066:0x0] }<br></div></div></div>
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