NFS-Ganesha w/gpfs FSAL And Other Use Cases
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1 NFS-Ganesha w/gpfs FSAL And Other Use Cases Marc Eshel, JV, Jim, Philippe 2/26/2013 1
2 SN MP via Age ntx (opt ion al) Log gin g Stat s Ad min GS SA PI The modules within NFS-Ganesha Has h Tab les clients requests Network Forechannel RPC Dispatcher Dup Req Layer Mount V1/V3 NLM, RQUOTA NFS V2 / V3 RPCSEC_GSS NFSv4.x/pNFS Network Backchannel Cache fs operations Cache fs callbacks File Content layer Cache Inode SAL Cache Inode UP fs operations fs callbacks File System Abstraction Layer FSAL UP Backend (POSIX, XFS, ZFS, PROXY, GPFS, SNMP, CEPH, HPSS, LUSTRE, VFS) 2
3 GPFS FSAL FSAL to GPFS posix like interfaces Open, close, read, write, remove,... File Descriptor requires open that can cause Lost shares or op-locks Use File Handle for most operations Use FS support of NFS export ops Convert FH to Linux dentry and use VFS Combine few operation into one Set Share reservation with open Get file attributes and ACLs 3
4 GPFS FSAL UP_CALLS Ganesha has an Inode cache and other state like Delegations and pnfs Layouts One thread per exported FS to maintain state in cluster environment or other access to same fs GPFS to FSAL up-calls Inode invalidate or update, grant locks Recall Delegations or pnfs Layouts Immediate up-calls, queued, or both Inode invalidate is immediate Layout recall is both immediate and queued 4
5 GPFS FSAL pnfs FSAL to GPFS pnfs interface On MDS Layout get/return/commit Get device-info device-list Recall Layout device-info On DS read/write/commit MDS DS backchannel communication FH given by MDS include its ip address DS check with MDS before I/O Open state and Layout information MDS will notify DS when file is closed 5
6 Use Case - SoNAS High level design of Cloud Storage infrastructure Other Future Interfaces Other Future Interfaces IP Network Lego-like modular design allows online independent scaling of I/O capacity and Storage capacity Ganesha Interface Node GPFS Client... High Speed Internal Network Ganesha Interface Node GPFS Client GPFS Server GPFS Server GPFS Server GPFS Server Storage Node Storage Node Storage Node Storage Node High Density Storage Drawer... High Density Storage Drawer High Density Storage Drawer High Density Storage Drawer Storage Pod Storage Pod
7 UseCase - ProtecTIER NFS-Ganesha + PT_FSAL IPC NFS Clients Backup/TSM Samba + PtSamba VFS C OST, VTL,... ProtecTIER HyperFactor VFS
8 Panasas Distributed Storage Current Product (ActiveStore 14) DirectFlow == pre-pnfs distributed object storage Object storage (pre-osd-osc iscsi) Director Blade PanFS meta-data server NFS V3 + CIFS Storage Blade OSD (Direct Flow + PanFS) 2x 4T disks (+ 400GB SSD) 8
9 Panasas pnfs DirectFlow + NFS pnfs Director Blade PanFS meta-data server Ganesha (NFSv3, NFSv4.0, 4.1 metadata) Storage Blade DirectFlow OSD OSD-OSC iscsi pnfs data server w/ object layout storage 9
10 CEA Used as a NFSv3/NLM server in part fo a large cluster at the TGCC/CCRT facility to export LUSTRE. Used at CEA (at the TERA facility) since 2006 for exporting the namespace of a HSM to compute clusters. - Now runs infornt of a petaflopic class cluster. Future compute machines will see an explosion of the number of CPU cores due to manycore model like Xeon Phi (and future evolution). A single server is no more reasonable => need for IO proxies The ratio of memory per core will drastically reduce => need for lightweight protocols Currently, CEA is developing IO Proxy model in Ganesha by Implementing 9p.2000L as a IO protocol (the protocol has fast and cacheless clients) Using RDMA as transport protocol (zero copy is easy in 9p.2000L) 10
11 NFS-Ganesha pointers NFS-Ganesha is available under the terms of the LGPLv3 license NFS-Ganesha is hosted on SourceForge: Project homepage Download page Mailing lists 11
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