What’s new in KrakenXSKYHaomai Wang

2016.12.09

Releases

• Hammerv0.94.x(LTS)– March '15• Infernalis v9.2.x– November'15• Jewelv10.2.x(LTS)– April'16• Krakenv11.2.x– December'16• Luminous v12.2.x(LTS)– April'17

RADOS -- BlueStore

• BlueStore =Block+NewStore• Key/value database(RocksDB)formetadata

• All datawritten directly to raw blockdevice(s)

• Inline compression(zlib,snappy,zstd)• ~2xfaster than FileStore

RADOS -- BlueStore

• Astable diskformat• Passing failureand stresstesting• Still flagged asexperimentfeature• Non-production and non-critical env

• Luminou• Remove experimentfeature• Full stable and readyfor broad usage

RADOS – Erasure Code Overwrite

• Experimentfeature• Diskformatand implementation arenotstable

• InitialRBDwithECOverwritetesting• Sequentialwriteperformancelooksgood!

• readssuffervs3xreplicationasexpected• smallrandomwritesalsosufferasexpected

RADOS – AsyncMessenger

• Newimplementationofnetworklayer• replacesagingSimpleMessenger• fixedsizethreadpool(vs2threadspersocket)• scalesbettertolargerclusters• morehealthyrelationshipwithtcmalloc• nowthedefault!

• Pluggablebackends• PosixStack – Linuxsockets,TCP(default,supported)

• Twoexperimentalbackends!

RADOS – AsyncMessenger

RADOS – AsyncMessenger Plugin

Ceph-MGR• ceph-monmonitordaemonscurrentlydoalot• morethantheyneedto(PGstatstosupportthingslike'df')• thislimitsclusterscalability

• ceph-mgr movesnon-criticalmetricsintoaseparatedaemon• thatismoreecient• thatcanstreamtographite,influxdb• thatcanefficientlyintegratewithexternalmodules(evenPython!)

• Goodhostfor• integrations,likeCalamariRESTAPIendpoint• comingfeatureslike'ceph top'or'rbd top’• high-levelmanagementfunctionsandpolicy

Ceph: QoS(DMClock)

• Setpolicyforboth• reserved/minimumIOPS• proportionalsharingofexcesscapacity• by• typeofIO(client,scrub,recovery)• pool• client(e.g.,VM)• BasedonmClock paperfromOSDI'10• IOscheduler• distributedenforcementwithcooperatingclients

RGW: Metadata Search

RGW: MISC

• Compression• SwiftstaticwebsiteAPI• S3 lifecycleAPI• CustomsearchfilterforLDAPauth• Python bindingforrgwfile

RBD: MISC

• Support erarsure codingpool• RBD Mirrorcansupportmetadatareplication• Rbd pythonapi supportsasync opeartions

CephFS: MISC

• Libcephfs enable properuid/gid control• Anew`pg_files`subcommandto`cephfs-data-scan`canidentifyfilesaffectedalostPG• Thefalse-positive"failingtorespondtocachepressure"warningshavebeenfixed• StandbyreplayMDSdaemonsnowconsumelessmemoryonworkloadsdoingdeletions• Scrubnowrepairsbacktrace,andpopulates`damagels` withdiscoverederrors.

Upgrade

• AllclustersmustfirstbeupgradedtoJewel10.2.zbeforeupgradingtoKraken11.2.z(or,eventually,Luminous12.2.z).

• NewMonwilluserocksdb asbackend

How To Help

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