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1、Buildingalowcost,highlyscalable,enterpriselevelcomputerforensicslabRaoul“Nobody”Chiesa,EthicalHackercametosecurity.WhentheservernumbergrewwehadForewordtroublefindingdataaroundthelocalnetwork.BuildingaSANgaveusonlynewheadaches:weDesktopharddrivesarebecomingbiggerand
2、bigger.needednewexpensivehardwarefortheinfrastructureHowever,serverharddisksarenotgrowingupatthe(FiberChannelcontrollerandswitch),andbothdiskssamerate.andstorageunitsweremuchmoreexpensive.Atpresent,youcanbuya1.5TbSataharddriveforOtherwisewestillneededsomewaytoshare
3、theSANabout150€.filesystemtotheanalysismachines.Acommon146Gb2.5SASharddrivecostsabout250Welookedforsomethingnewinthemarket.Wefound€.TheCosttoMegabyteratiomeansSAStechnologyismanyclusterfilesystemlikeocfs15timesmoreexpensive.(http://oss.oracle.com/projects/ocfs2/),l
4、ustreThisisaproblem.Desktopsaregettingbiggerbutyou(http://wiki.lustre.org/index.php?title=Main_Page)andneedevenbiggerstoragetostorealldatarelatedtoanothers,buttheyweretootiedtoclusterlogic.investigationanditmustbekeptalsoonlineandsecure.Wefoundsomeinterestingnetwor
5、kfilesystemslikeCurrently,biggerharddrivesareaffordablebutveryCODA(http://www.coda.cs.cmu.edu/)butitfragile.Brokenharddrivesarequitecommon,muchlacksmultiplatformsupportanditsdevelopmentismorethaninpreviousyears.incrediblyslow.So...youneed:1.Theflexibilityfromhigh-e
6、ndstorageAttheendwefoundOpenAFSsolutions,likeSANtoallowthe(http://www.openafs.org).OpenAFSisanamazingstoragetogrowwithyourbusinesstechnology:1.Stable:it'sbeenaroundsince19892.Thecheapnessofactualdesktopharddrives,tryingtolowerthe2.Multiplatform:manyUnixflavors,cost
7、-per-megabyteMicrosoftWindows,AppleMacintosh...3.Availability.Nodowntime,ever3.Secure:kerberos-basedAuthentication,encryption,strongACL4.Redundancy.Yourdatamustresistbothharddriveandservercrashes4.EnterpriseLevel:UsedbymanyFortune500companies,Universities,ResearchC
8、enters,governmentorganizationsInaddition,itshouldbeaverygoodideatoreachalso5.Scalable:Youcanstartwithasinglethesegoals:computertoreachhundredmach
