标题: 逻辑卷占用物理分区的疑惑 [打印本页] 作者: lxsun 时间: 2008-04-21 16:42 标题: 逻辑卷占用物理分区的疑惑 查看逻辑卷lv00信息\r\n# lslv lv00\r\nLOGICAL VOLUME: lv00 VOLUME GROUP: rootvg\r\nLV IDENTIFIER: 000b5c8d00004c0000000119100aa9df.13 PERMISSION: read/write\r\nVG STATE: active/complete LV STATE: opened/syncd\r\nTYPE: jfs WRITE VERIFY: off\r\nMAX LPs: 512 PP SIZE: 64 megabyte(s)\r\nCOPIES: 1 SCHED POLICY: parallel\r\nLPs: 16 PPs: 16\r\nSTALE PPs: 0 BB POLICY: relocatable\r\nINTER-POLICY: minimum RELOCATABLE: yes\r\nINTRA-POLICY: middle UPPER BOUND: 32\r\nMOUNT POINT: /hhmd LABEL: /hhmd\r\nMIRROR WRITE CONSISTENCY: on/ACTIVE \r\nEACH LP COPY ON A SEPARATE PV ?: yes \r\nSerialize IO ?: NO \r\n\r\n看到给lv00分配物理是16个pp,位置在外中间，而用以下命令看到lv00信息如下： \r\n# lspv -p hdisk1\r\nhdisk1:\r\nPP RANGE STATE REGION LV NAME TYPE MOUNT POINT\r\n 1-1 used outer edge hd5 boot N/A\r\n 2-69 free outer edge \r\n70-85 used outer edge hd6 paging N/A\r\n86-93 used outer edge lv01 jfs /usr/patrol\r\n94-109 used outer edge lv00 jfs /hhmd\r\n110-117 used outer middle hd3 jfs /tmp\r\n118-118 free outer middle \r\n119-119 used outer middle loglv00 jfs2log N/A\r\n120-121 used outer middle fslv00 jfs2 /home/lxsun\r\n122-128 free outer middle \r\n129-134 used outer middle hd4 jfs /\r\n135-141 used outer middle hd3 jfs /tmp\r\n142-144 used outer middle hd2 jfs /usr\r\n145-217 used outer middle hd1 jfs /home\r\n218-218 used center hd8 jfslog N/A\r\n219-219 used center hd4 jfs /\r\n220-220 used center hd2 jfs /usr\r\n221-221 used center hd9var jfs /var\r\n222-222 used center hd3 jfs /tmp\r\n223-223 used center hd1 jfs /home\r\n224-224 used center hd10opt jfs /opt\r\n225-239 used center hd2 jfs /usr\r\n240-325 used center hd1 jfs /home\r\n326-326 used inner middle hd4 jfs /\r\n327-339 used inner middle hd2 jfs /usr\r\n340-433 free inner middle \r\n434-542 free inner edge \r\n不明白其中的原由，请大侠指点一下。作者: yddll 时间: 2008-04-21 17:44
一个是policy，一个region作者: shagua1ge 时间: 2008-04-22 02:47
Because you had \r\nINTER-POLICY: minimum\r\nso the system allocated continuous 16 PPs on the same disk (PV).\r\nThen you defined\r\nINTRA-POLICY: middle\r\nso the system tried to allocated the continuous 16 PPs in the outer middle area, unfortunately, there was no enough room for 16 PPs; then the system tried the next better choice \"outer edge\" which is fast than \"inner middle\".作者: lxsun 时间: 2008-04-22 09:50 标题: 回复 #3 shagua1ge 的帖子 我也这么想过，但由于初学，觉得没什么权威性。多谢了！