<div dir="ltr">Hello everyone,<div><br></div><div>We have drained some of our OSS/OSTs and plan to deactivate them soon. The process ahead leads us to a couple of questions that we hope somebody can advise us on.</div><div><br></div><div>Scenario</div><div>We have fully drained the target OSTs using <b> 'lfs find'</b> to identify all files located on the targets and then feeding the list to '<b>lfs migrate</b>. ' A final scan shows there are no files left on the targets.</div><div><br></div><div>Questions</div><div>1) Running '<b>lfs df -h'</b> still shows some space being used even though we have drained all of the data. Is that normal? i.e.</div><div><br></div><div>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">UUID <span class="gmail-Apple-converted-space"> </span>bytes<span class="gmail-Apple-converted-space"> </span>Used <span class="gmail-Apple-converted-space"> </span>Available Use% Mounted on</span></p></div><div>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"><font color="#1008b6">hydra-OST0010_UUID </font><span class="gmail-Apple-converted-space" style="color:rgb(16,8,182)"> </span><font color="#1008b6">84.7T</font><span class="gmail-Apple-converted-space" style="color:rgb(16,8,182)"> </span><span style="background-color:rgb(255,255,0)"><font color="#0b5394">583.8M</font> </span><span class="gmail-Apple-converted-space" style="color:rgb(16,8,182)"> </span><font color="#1008b6">80.5T </font><span class="gmail-Apple-converted-space" style="color:rgb(16,8,182)"> </span><font color="#1008b6">1% /dfs/hydra[OST:16]</font></span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0011_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>581.4M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:17]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0012_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>581.7M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:18]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0013_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>582.4M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:19]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0014_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>584.1M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:20]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0015_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>583.4M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:21]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0016_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>583.6M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:22]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0017_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>581.8M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:23]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0018_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>582.6M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:24]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST0019_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>582.7M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:25]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST001a_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>580.0M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:26]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST001b_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>580.4M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:27]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST001c_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>582.1M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:28]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST001d_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>583.2M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:29]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST001e_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>583.7M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:30]</span></p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(16,8,182)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">hydra-OST001f_UUID <span class="gmail-Apple-converted-space"> </span>84.7T<span class="gmail-Apple-converted-space"> </span>587.7M <span class="gmail-Apple-converted-space"> </span>80.5T <span class="gmail-Apple-converted-space"> </span>1% /dfs/hydra[OST:31]</span></p></div><div><br></div><div><br></div><div>2) According to some comments, prior to deactivating the OSS/OSTs, we should add the <b>'lazystatfs'</b> option to all of our client mounts so that they do not hang once we deactivate some of the OSTs. Is that correct? If so, why would you not just always have that option set? What are the ramifications of doing it well in advance of the OST deactivations?</div><div><br></div><div>Thanks in advance for feedback,</div><div><br></div><div>Mike</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div>