网格计算与云计算new

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1、云计算与网格计算CloudComputing&GridComputing云计算发展现状网格计算发展现状网格计算与云计算我们所做工作结论与展望内容提纲云计算是个新名词CloudComputing3云计算到底是什么？它是皇帝的新衣吗？从技术上看它是如何实现的？它与网格计算是什么关系？网格计算现状如何？二者的发展前景如何？大家关心的问题Google云计算UserCentricDatastoredinthe“Cloud”Datafollowsyou&yourdevicesDataaccessibleanywhereDatacanbesha

2、redwithothersmusicpreferencesmapsnewscontactsmessagesmailinglistsphotoe-mailscalendarphonenumbersinvestmentsGoogle的三大法宝GoogleFileSystem(GFS)BigTableMapReduce8GFSArchitectureGoogle48%MSN19%Yahoo33%Filesbrokenintochunks(typically64MB)MastermanagesmetadataDatatransfersha

3、ppendirectlybetweenclients/chunkserversClientClientClientReplicasMastersGFSMasterGFSMasterC0C1C2C5Chunkserver1C0C2C5ChunkserverNC1C3C5Chunkserver2…ClientClientClientClientClientClientGFSUsage@Google200+clustersFilesystemclustersofupto5000+machinesPoolsof10000+clients5

4、+PetabyteFilesystemsAllinthepresenceoffrequentHWfailureGoogle的三大法宝GoogleFileSystem(GFS)BigTableMapReduceBigTableDatamodel(row,column,timestamp)cellcontentsBigTableDistributedmulti-levelsparsemapFault-tolerance,persistentScalableThousandofserversTerabytesofin-memoryda

5、taPetabytesofdisk-baseddataSelf-managingServerscanbeadded/removeddynamicallyServersadjusttoloadimbalanceGoogle的三大法宝GoogleFileSystem(GFS)BigTableMapReduceMapReduce–ANewModelandSystemTwophasesofdataprocessingMap:(in_key,in_value){(keyj,valuej)

6、j=1…k}Reduce:(key,[value1

7、,…valuem])(key,f_value)亚玛逊云计算AmazonSimpleStorageService$.15perGBpermonthstorageObject-BasedStorage1B–5GB/objectFast,Reliable,ScalableRedundant,Dispersed99.99%AvailabilityGoalPrivateorPublicPer-objectURLs&ACLsBitTorrentSupport$.10-$.18perGBdatatransfer$.01for1000to100

8、00requestsS3SOAP/QueryAPIService:ListAllMyBucketsBuckets:CreateBucketDeleteBucketListBucketGetBucketAccessControlPolicySetBucketAccessControlPolicyGetBucketLoggingStatusSetBucketLoggingStatusObjects:PutObjectPutObjectInlineGetObjectGetObjectExtendedDeleteObjectGetObje

9、ctAccessControlPolicySetObjectAccessControlPolicyAmazonElasticComputeCloud$.10perserverhourVirtualComputeCloudElasticCapacit