基于高可用并行文件系统的分布式元数据管理

::::,2003,20031212™™™™™™™™™™™™.(.(DistributedDistributedMetadataStorageSubMetadataStorageSub--system,system,DMSDMS))™™DMSDMSHandyHandy,,HandyHandy11™™¾¾(metadata)(metadata)¾¾¾¾22™™••••••••••••••33™™••••••••••(RAID3)(RAID3)••(())••••••••44™™ClientsClientsConsoleConsoleStorageServersStorageServerslogicalcirclelogicalcircle••••••••55™™¾¾DHashDHashp2pp2p¾¾Key/ValueKey/Value¾¾¾¾(6)(6)™™••••••RAIDRAID••DHashDHashHandyHandy••••DMSDMS••••••••••(1)(1)™™¾¾¾¾¾¾¾¾(2)(2)™™FSFSAPIAPIIDAIDADMSDMSDMSDMSDSPDSPDMSDMSDSPDSP(1)(1)™™¾¾¾¾¾¾(2)(2)™™¾¾¾¾¾¾¾¾(3)(3)™™¾¾DMSDMSAPIAPI¾¾put(k,b):put(k,b):bbkk,,kk,,..¾¾get(k):get(k):k,k,..(4)(4)storageserverstorageserverblockblockfragmentfragmentblockDBblockDBfragmentDBfragmentDBFSclientFSclient™™put(k,b)put(k,b)IDAIDAreturnreturnkeykeyofficeofficexpxp(5)(5)storageserverstorageserverblockblockfragmentfragmentblockDBblockDBfragmentDBfragmentDBFSclientFSclient™™get(key)get(key)get(key)get(key)IDAIDAkeykeyofficeofficexpxp(6)(6)™™¾¾::ƒƒ14141616ƒƒƒƒKeyKey1414--1616¾¾::ƒƒ::,,ƒƒ::,,ƒƒ::,,(7)(7)storageserverstorageserverblockblockfragmentfragmentblockDBblockDBfragmentDBfragmentDB™™™™2004.1~2004.2:2004.1~2004.2:™™2004.3~2004.42004.3~2004.4™™2004.5~2004.82004.5~2004.8™™2004.9~2004.122004.9~2004.12™™2005.1~2005.4:2005.1~2005.4:,,!!!!