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SFS UMN DOC

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Reviewed-by: Muller, Martin <martin.muller@t-systems.com>
Co-authored-by: zhangyue <zhangyue164@huawei.com>
Co-committed-by: zhangyue <zhangyue164@huawei.com>
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zhangyue 2024-11-28 07:35:21 +00:00 committed by zuul
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</div>
</div>
<div class="section" id="sfs_01_0005__section1263961973411"><h4 class="sectiontitle">General Purpose File System (BETA)</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="sfs_01_0005__table1763981963410" frame="border" border="1" rules="all"><caption><b>Table 2 </b>General purpose file systems</caption><thead align="left"><tr id="sfs_01_0005__row36391019133415"><th align="left" class="cellrowborder" valign="top" width="32.64%" id="mcps1.3.4.2.2.3.1.1"><p id="sfs_01_0005__p116391019103410">Parameter</p>
<div class="tablenoborder"><a name="sfs_01_0005__table1763981963410"></a><a name="table1763981963410"></a><table cellpadding="4" cellspacing="0" summary="" id="sfs_01_0005__table1763981963410" frame="border" border="1" rules="all"><caption><b>Table 2 </b>General purpose file systems</caption><thead align="left"><tr id="sfs_01_0005__row36391019133415"><th align="left" class="cellrowborder" valign="top" width="32.64%" id="mcps1.3.4.2.2.3.1.1"><p id="sfs_01_0005__p116391019103410">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="67.36%" id="mcps1.3.4.2.2.3.1.2"><p id="sfs_01_0005__p1863971912348">Description</p>
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</tr>
<tr id="sfs_01_0005__row16639111912348"><td class="cellrowborder" valign="top" width="32.64%" headers="mcps1.3.4.2.2.3.1.1 "><p id="sfs_01_0005__p8639819113416">Max. capacity</p>
</td>
<td class="cellrowborder" valign="top" width="67.36%" headers="mcps1.3.4.2.2.3.1.2 "><p id="sfs_01_0005__p106392199344">EB</p>
<td class="cellrowborder" valign="top" width="67.36%" headers="mcps1.3.4.2.2.3.1.2 "><p id="sfs_01_0005__p106392199344">4 PB</p>
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<tr id="sfs_01_0005__row96392198348"><td class="cellrowborder" valign="top" width="32.64%" headers="mcps1.3.4.2.2.3.1.1 "><p id="sfs_01_0005__p15639419113412">Highlights</p>
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</table>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="sfs_01_0005__table1097186343" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Previous-generation SFS Turbo file systems</caption><tbody><tr id="sfs_01_0005__row139813813345"><td class="cellrowborder" valign="top" width="14.469999999999999%"><p id="sfs_01_0005__p79815815349"><strong id="sfs_01_0005__b1812667571">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="sfs_01_0005__table1097186343" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Previous-generation SFS Turbo file systems</caption><tbody><tr id="sfs_01_0005__row139813813345"><td class="cellrowborder" valign="top" width="14.469999999999999%"><p id="sfs_01_0005__p79815815349"><strong id="sfs_01_0005__b156078490">Parameter</strong></p>
</td>
<td class="cellrowborder" valign="top" width="17.32%"><p id="sfs_01_0005__p1468353311201"><strong id="sfs_01_0005__b1311369539">Standard</strong></p>
<td class="cellrowborder" valign="top" width="17.32%"><p id="sfs_01_0005__p1468353311201"><strong id="sfs_01_0005__b1275955683">Standard</strong></p>
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<td class="cellrowborder" valign="top" width="20.830000000000002%"><p id="sfs_01_0005__p568383319207"><strong id="sfs_01_0005__b694614219">Standard-Enhanced</strong></p>
<td class="cellrowborder" valign="top" width="20.830000000000002%"><p id="sfs_01_0005__p568383319207"><strong id="sfs_01_0005__b270685239">Standard-Enhanced</strong></p>
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<td class="cellrowborder" valign="top" width="25.06%"><p id="sfs_01_0005__p1368373302017"><strong id="sfs_01_0005__b1911714151">Performance</strong></p>
<td class="cellrowborder" valign="top" width="25.06%"><p id="sfs_01_0005__p1368373302017"><strong id="sfs_01_0005__b1129154929">Performance</strong></p>
</td>
<td class="cellrowborder" valign="top" width="22.32%"><p id="sfs_01_0005__p106831333172014"><strong id="sfs_01_0005__b480777721">Performance-Enhanced</strong></p>
<td class="cellrowborder" valign="top" width="22.32%"><p id="sfs_01_0005__p106831333172014"><strong id="sfs_01_0005__b999372369">Performance-Enhanced</strong></p>
</td>
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<tr id="sfs_01_0005__row9981880344"><td class="cellrowborder" valign="top" width="14.469999999999999%"><p id="sfs_01_0005__p159819810344">Max. bandwidth</p>
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</tbody>
</table>
</div>
<div class="note" id="sfs_01_0005__note175496573249"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="sfs_01_0005__ul16230103915393"><li id="sfs_01_0005__li22301939193911">In the table, the maximum IOPS and maximum bandwidth all include both the read and write operations. So, maximum IOPS = read IOPS + write IOPS.</li><li id="sfs_01_0005__li13231203963914">The expansion increment of SFS Turbo Standard, Standard - Enhanced, Performance, or Performance - Enhanced file systems is 100 GB. The expansion increment of 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, or 250 MB/s/TiB file systems is 1.2 TB.</li><li id="sfs_01_0005__li1169162222520">Maximum performance can be reached with multiple ECSs in parallel which have recommended configuration c4.4xlarge.4.</li></ul>
<div class="note" id="sfs_01_0005__note175496573249"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="sfs_01_0005__ul16230103915393"><li id="sfs_01_0005__li22301939193911">In the table, the maximum IOPS and maximum bandwidth all include both the read and write operations. So, maximum IOPS = read IOPS + write IOPS.</li><li id="sfs_01_0005__li13231203963914">The minimum expansion increment of SFS Turbo Standard, Standard-Enhanced, Performance, and Performance-Enhanced file systems is 100 GB. The expansion increment of 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, and 250 MB/s/TiB file systems is 1.2 TB.</li><li id="sfs_01_0005__li1169162222520">Maximum performance can be reached with multiple ECSs in parallel which have recommended configuration c4.4xlarge.4.</li></ul>
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<tr id="sfs_01_0039__row14548173552920"><td class="cellrowborder" valign="top" width="27.439999999999998%" headers="mcps1.3.4.2.3.2.2.2.3.1.1 "><p id="sfs_01_0039__p18404459836">New Capacity</p>
</td>
<td class="cellrowborder" valign="top" width="72.56%" headers="mcps1.3.4.2.3.2.2.2.3.1.2 "><p id="sfs_01_0039__p440417591319">New storage capacity of the file system</p>
<div class="p" id="sfs_01_0039__p08062238817">Value constraints:<ul id="sfs_01_0039__ul188061223685"><li id="sfs_01_0039__li38061223484">For a Standard, Standard – Enhanced, Performance, or Performance – Enhanced file system, the expansion increment is 100 GB. A Standard or Performance file system can be expanded to up to 32 TB, and a Standard - Enhanced or Performance - Enhanced file system can be expanded to up to 320 TB.</li><li id="sfs_01_0039__li780615235817">For a 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, or 250 MB/s/TiB file system, the expansion increment is 1.2 TB, and a file system can be expanded to up to 1 PB.</li></ul>
<div class="p" id="sfs_01_0039__p08062238817">Value constraints:<ul id="sfs_01_0039__ul188061223685"><li id="sfs_01_0039__li38061223484">For a Standard, Standard-Enhanced, Performance, or Performance-Enhanced file system, the minimum expansion increment is 100 GB. A Standard or Performance file system can be expanded to up to 32 TB, and a Standard - Enhanced or Performance - Enhanced file system can be expanded to up to 320 TB.</li><li id="sfs_01_0039__li780615235817">For a 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, or 250 MB/s/TiB file system, the expansion increment is 1.2 TB, and a file system can be expanded to up to 1 PB.</li></ul>
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</li>
<li class="ulchildlink"><strong><a href="sfs_01_0068.html">What Is SFS Turbo?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="sfs_01_0069.html">What Are the Differences Between SFS, OBS, and EVS?</a></strong><br>
</li>
</ul>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="sfs_01_0076.html">Can the Capacity of a File System Be Expanded?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="sfs_01_0077.html">Can I Migrate My File System Data to Another Region?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="sfs_01_0078.html">Can a File System Be Mounted to Multiple Accounts?</a></strong><br>
</li>
</ul>
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<h1 class="topictitle1">Can I Migrate My File System Data to Another Region?</h1>
<div id="body1566785584366"><p id="sfs_01_0077__p412635883613">Cross-region migration of file system data is currently not supported for SFS Capacity-Oriented and general purpose file systems. It is recommended that you select an appropriate region when purchasing a file system. Alternatively, you can copy the data to a local device and transfer it to another region.</p>
<p id="sfs_01_0077__p38557441489">SFS Turbo supports cross-region data migration. You can use Cloud Connect to connect VPCs across regions and then mount the file system and migrate the data.</p>
</div>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="sfs_01_0075.html">Restrictions</a></div>
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<a name="sfs_01_0078"></a><a name="sfs_01_0078"></a>
<h1 class="topictitle1">Can a File System Be Mounted to Multiple Accounts?</h1>
<div id="body1567130705611"><p id="sfs_01_0078__p863135613152">SFS Capacity-Oriented file systems can be mounted across accounts.</p>
<p id="sfs_01_0078__p2631156141519">General purpose file systems cannot be mounted across accounts.</p>
<p id="sfs_01_0078__p15996184423616">SFS Turbo file systems can be mounted across accounts based on VPC peering. For details about VPC peering connection and usage instructions, see section "VPC Peering Connection" in <em id="sfs_01_0078__i10728135591">Virtual Private Cloud User Guide</em>.</p>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="sfs_01_0075.html">Restrictions</a></div>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="sfs_01_0080.html">Can a File System Be Accessed Across VPCs?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="sfs_01_0111.html">Does SFS Support Cross-Region Mounting?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="sfs_01_0081.html">Does the Security Group of a VPC Affect SFS?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="sfs_01_0082.html">What Can I Do If Data of My File System Is Not the Same When Accessed from Two Client Servers?</a></strong><br>
</li>
</ul>
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<h1 class="topictitle1">What Can I Do If Data of My File System Is Not the Same When Accessed from Two Client Servers?</h1>
<div id="body1571368802666"><div class="section" id="sfs_01_0082__section41158684111639"><h4 class="sectiontitle">Symptom</h4><p id="sfs_01_0082__p39221336111646">A file system was mounted to two servers. There was a delay in synchronizing files from one server to another. However, there was no delay when files were uploaded to a server.</p>
</div>
<div class="section" id="sfs_01_0082__section75191483415"><h4 class="sectiontitle">Fault Diagnosis</h4><p id="sfs_01_0082__p814811102519">Add <strong id="sfs_01_0082__b11543337202210">noac, lookupcache=none</strong> to the mount command.</p>
<p id="sfs_01_0082__p8468205604119">The <strong id="sfs_01_0082__b2012744562312">noac</strong> option disables file attribute caching and forces write synchronization. By default, an NFS client's file attribute information is cached using the <strong id="sfs_01_0082__b318971910219">ac</strong> option to improve performance, and the client checks file attribute information periodically and updates it if there are any changes. Within the cache validity period, the client does not check whether file attribute information on the server is changed. By default, the value of this option is <strong id="sfs_01_0082__b1423777122318">ac</strong>. Set it to <strong id="sfs_01_0082__b12197202213232">noac</strong>.</p>
<p id="sfs_01_0082__p3857837259">The <strong id="sfs_01_0082__b11695204513254">lookupcache</strong> option is related to directory entry caching, and the value can be <strong id="sfs_01_0082__b9257012174315">all</strong>, <strong id="sfs_01_0082__b2823914154318">none</strong>, <strong id="sfs_01_0082__b6552820124315">pos</strong>, or <strong id="sfs_01_0082__b158819228433">positive</strong>. With <strong id="sfs_01_0082__b5750205944313">lookupcache=none</strong>, the client neither trust the positive nor negative lookup results. In this way, lookup caching is disabled.</p>
</div>
<div class="section" id="sfs_01_0082__section635392619212"><h4 class="sectiontitle">Solution</h4><ol id="sfs_01_0082__ol9835123119449"><li id="sfs_01_0082__li86473084518"><span>Unmount the file system if it has been mounted. To unmount a file system, see <a href="sfs_01_0026.html">Unmount a File System</a>.</span></li><li id="sfs_01_0082__li1583543134412"><span>Complete the preparations before mounting the file system. For details, see <a href="sfs_01_1001.html">Mounting an NFS File System to ECSs (Linux)</a>.</span></li><li id="sfs_01_0082__li1874943054413"><span>Mount the file system.</span><p><pre class="screen" id="sfs_01_0082__screen79405318553"><strong id="sfs_01_0082__b12946183165520">mount -t nfs -o vers=3,timeo=600,noac,lookupcache=none,noresvport,nolock</strong> <em id="sfs_01_0082__i65841642204011">Shared path</em> <em id="sfs_01_0082__i1371964974018">Local path</em></pre>
</p></li></ol>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="sfs_01_0079.html">Networks</a></div>
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</th>
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</thead>
<tbody><tr id="sfs_01_0104__row2304103619477"><td class="cellrowborder" valign="top" width="17.669999999999998%" headers="mcps1.3.1.1.3.1.1 "><p id="sfs_01_0104__p38451149104820">2024-10-23</p>
<tbody><tr id="sfs_01_0104__row1857891271114"><td class="cellrowborder" valign="top" width="17.669999999999998%" headers="mcps1.3.1.1.3.1.1 "><p id="sfs_01_0104__p15578131217114">2024-11-21</p>
</td>
<td class="cellrowborder" valign="top" width="82.33%" headers="mcps1.3.1.1.3.1.2 "><p id="sfs_01_0104__p857811217113">Updated the following content:</p>
<ul id="sfs_01_0104__ul99621931111110"><li id="sfs_01_0104__li7757451181115">Updated the maximum capacity of a <a href="sfs_01_0005.html#sfs_01_0005__table1763981963410">general purpose file system</a>.</li><li id="sfs_01_0104__li2962113131118">Added <a href="sfs_01_0069.html">What Are the Differences Between SFS, OBS, and EVS?</a></li><li id="sfs_01_0104__li7181104391117">Added <a href="sfs_01_0077.html">Can I Migrate My File System Data to Another Region?</a></li><li id="sfs_01_0104__li2076774319115">Added <a href="sfs_01_0078.html">Can a File System Be Mounted to Multiple Accounts?</a></li><li id="sfs_01_0104__li3340104491113">Added <a href="sfs_01_0111.html">Does SFS Support Cross-Region Mounting?</a></li><li id="sfs_01_0104__li9925194461113">Added <a href="sfs_01_0082.html">What Can I Do If Data of My File System Is Not the Same When Accessed from Two Client Servers?</a></li></ul>
</td>
</tr>
<tr id="sfs_01_0104__row2304103619477"><td class="cellrowborder" valign="top" width="17.669999999999998%" headers="mcps1.3.1.1.3.1.1 "><p id="sfs_01_0104__p38451149104820">2024-10-23</p>
</td>
<td class="cellrowborder" valign="top" width="82.33%" headers="mcps1.3.1.1.3.1.2 "><p id="sfs_01_0104__p13624155131612">Updated the following content:</p>
<ul id="sfs_01_0104__ul2275144084218"><li id="sfs_01_0104__li427594019424">Added descriptions about General Purpose File System.</li><li id="sfs_01_0104__li13275154020428">Deleted section "Supported OSs."</li></ul>

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<h1 class="topictitle1">Does SFS Support Cross-Region Mounting?</h1>
<div id="body1592295734126"><p id="sfs_01_0111__p98144132042">SFS Capacity-Oriented file systems cannot be mounted across regions. A file system can only be mounted to ECSs in the same region.</p>
<p id="sfs_01_0111__p44219398566">General purpose file systems can be mounted across AZs in the same region, but cannot be mounted across regions.</p>
<p id="sfs_01_0111__p83431557151914">SFS Turbo file systems can be mounted across AZs in the same region, but cannot be mounted across regions. However, if you have used Cloud Connect to enable cross-region communication, SFS Turbo file system can be mounted across regions by specified IP address.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="sfs_01_0079.html">Networks</a></div>
</div>
</div>