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Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: luhuayi <luhuayi@huawei.com> Co-committed-by: luhuayi <luhuayi@huawei.com>
117 lines
11 KiB
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117 lines
11 KiB
HTML
<a name="EN-US_TOPIC_0000001811610001"></a><a name="EN-US_TOPIC_0000001811610001"></a>
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<h1 class="topictitle1">PGXC_GROUP</h1>
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<div id="body8662426"><p id="EN-US_TOPIC_0000001811610001__a903271841b9d4f78ad8436022c35aacc">PGXC_GROUP records node group information. In storage-compute decoupling 3.0 version, each node group in a logical cluster is called a Virtual Warehouse (VW). At the storage KV layer, each VW corresponds to a vgroup.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001811610001__t09d8e10f76724678a8f221dd29db736a" frame="border" border="1" rules="all"><caption><b>Table 1 </b>PGXC_GROUP columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001811610001__r296db8ff4a4f4195b3fd7d935ac3436d"><th align="left" class="cellrowborder" valign="top" width="33.33%" id="mcps1.3.2.2.4.1.1"><p id="EN-US_TOPIC_0000001811610001__aabed0b68691942108b0e3aa157377da7"><strong id="EN-US_TOPIC_0000001811610001__b4249967764351">Column</strong></p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="17.919999999999998%" id="mcps1.3.2.2.4.1.2"><p id="EN-US_TOPIC_0000001811610001__aae8adcb14b634a4793c5c29a8ded37cd">Type</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="48.75%" id="mcps1.3.2.2.4.1.3"><p id="EN-US_TOPIC_0000001811610001__a4d5efd63bff341d59af7eb1359385af9">Description</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="EN-US_TOPIC_0000001811610001__r4058f6bdc9254911b191aa0e08d7edb6"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__a304d0e333be14698b72a0b84ea021b3f">group_name</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__ac9c372b991894c798b9fecec1fe03ea8">Name</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__aa4d470d9917d4fedbce5cd58c754ce42">Node group name</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__rbf5e6672620c4b1da141f08c7a5297ea"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__aa92547969f374a10b50b98856967e189">in_redistribution</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__a832c723523be47bc89aaa08fa2190dc2">Char</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p31791216459">Whether redistribution is required</p>
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<ul id="EN-US_TOPIC_0000001811610001__ul18285112624511"><li id="EN-US_TOPIC_0000001811610001__li1352029194510"><strong id="EN-US_TOPIC_0000001811610001__b1834472220">n</strong> indicates that the NodeGroup is not redistributed.</li><li id="EN-US_TOPIC_0000001811610001__li439893574519"><strong id="EN-US_TOPIC_0000001811610001__b58741118928">y</strong> indicates the source NodeGroup in redistribution.</li><li id="EN-US_TOPIC_0000001811610001__li1453323319459"><strong id="EN-US_TOPIC_0000001811610001__b33782421023">t</strong> indicates the destination NodeGroup in redistribution.</li><li id="EN-US_TOPIC_0000001811610001__li3490185312411"><strong id="EN-US_TOPIC_0000001811610001__b184351111265">s</strong> indicates that the NodeGroup will skip redistribution.</li></ul>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__r9a69c15440fd4b3d86b38804ac7efffd"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__ad05106b99114452fb039e9b113ebde35">group_members</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__a6f502ef221ec4b8d8e5393022effc5bd">oidvector_extend</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__a13de41723a05484d86ab3c303d4c522a">Node OID list of the node group</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__r3b0439badf02493a9fc3a84029209848"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__a82cecb6d78fa4bbab67548f2a7a71d29">group_buckets</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__a32fd73348caf4482ad7acd39e5abfe13">Text</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__aca413da9e4ea45aba0d8b389dcf956ec">Distributed data bucket group</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row204781949282"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p194796491814">is_installation</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p3479124915820"><span id="EN-US_TOPIC_0000001811610001__text518111518390">boolean</span></p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p204793499820">Whether to install a sub-cluster</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row14389195612816"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p53905561187">group_acl</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p1239019567817">aclitem[]</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p14390856089">Access permissions</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row3574632132718"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p657423282719">group_kind</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p10574163220276">Char</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p983814616462">Node group type.</p>
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<ul id="EN-US_TOPIC_0000001811610001__ul15661125613306"><li id="EN-US_TOPIC_0000001811610001__li266111560303"><strong id="EN-US_TOPIC_0000001811610001__b8439111322813">i</strong> indicates the installation node group, which contains all DNs.</li><li id="EN-US_TOPIC_0000001811610001__li266275611308"><strong id="EN-US_TOPIC_0000001811610001__b8583161812820">n</strong> indicates a common non-logical cluster node group.</li><li id="EN-US_TOPIC_0000001811610001__li116625560309"><strong id="EN-US_TOPIC_0000001811610001__b15749521852758">v</strong> indicates a logical cluster node group.</li><li id="EN-US_TOPIC_0000001811610001__li76623562308"><strong id="EN-US_TOPIC_0000001811610001__b11238585152758">e</strong> indicates the elastic cluster node group.</li><li id="EN-US_TOPIC_0000001811610001__li192238271029"><strong id="EN-US_TOPIC_0000001811610001__b140240890952758">r</strong> indicates a replication table node group, which can only be used to create replication tables and can contain one or more logical cluster node groups.</li></ul>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row16512133103112"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p1578518499522">group_ckpt_csn</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p16785184995215">Xid</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p878519492520">CSN of the last incremental extraction performed on a node group</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row37181892317"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p543134425617">vgroup_id</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p1043144415614">Xid</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p1744184414564">ID of the vgroup corresponding to the node group</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row15113141117314"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p46504213578">vgroup_bucket_count</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p4650621574">OID</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p26509216576">Number of buckets in the vgroup corresponding to the node group</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row1373612133115"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p2681952125716">group_ckpt_time</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p186811525579">Timestamp with time zone</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p1368116528572">Physical time when the last incremental extraction is performed on a node group</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row208801413183114"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p327171415813">apply_kv_duration</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p1327141435816">Integer</p>
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</td>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p182713147589">Duration of incremental scanning in the last incremental extraction of a node group, in seconds</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001811610001__row6447415173118"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811610001__p20157173725811">ckpt_duration</p>
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</td>
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<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811610001__p9157193735814">Integer</p>
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<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811610001__p13157537105815">Checkpoint duration in the last incremental extraction of a node group, in seconds</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0561.html">System Catalogs</a></div>
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</div>
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</div>
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