Matrix performance section

From Linux NFS

Contents 1 IV.A Comparison of NFSv4 vs. NFSv3 for common use cases 2 IV.B NFSv4 on TCP vs. RDMA 3 IV.C Test performance on different local filesystems 4 IV.D Test perfomance on different cluster filesystems 5 IV.E Evaluation in various load scenarios 6 Evaluation in stress scenarios 7 Scalability (performance)

IV.A Comparison of NFSv4 vs. NFSv3 for common use cases

ID	test	tool test	status	owner	notes
IV.A.1	Time to perform sequence of unique read/write operations	Iozone	Open	Bull	Done by Bull in 2004
IV.A.2	Time to perform sequence of cacheable read/write operations	Iozone	New
IV.A.3	Random reads/writes/opens from many clients to one server	Iozone	Open	Bull	Done by Bull in 2004
IV.A.4	Industry standard loads	SpecSFS, Specweb99	New		Tools does not exist
IV.A.5	Time to read file from beginning to end and then rewrite it	IOzone	In progress	Bull	Part of IOZone standard tests
IV.A.6	Time for appending info to a log file sporadically over time	Iozone	New	Bull
IV.A.7	Metadata - open/close intensive workload	Iozone	New	Bull
IV.A.8	Metadata - directory scanning	Iozone	Open	Bull
IV.A.9	Metadata - create/delete	Iozone	New	Bull
IV.A.10	Metadata - changing attributes (chown, chmod) while dir scanning	IOZone	New	Bull
IV.A.11	How many locks can be made and released over time	FFsB	New	Bull
IV.A.12	Comparison of speeds attainable for different NIC cards

IV.B NFSv4 on TCP vs. RDMA

ID	test	tool test	status	owner	notes
IV.B	Compare latency, throughput, etc. of NFSv4 on TCP vs. RDMA		New		Only prototypes exist currently; possibly will be more fully implemented by end of 2005

IV.C Test performance on different local filesystems

ID	test	tool test	status	owner	notes
IV.C.1	Analyze whether file system choice affects performance	Iozone	Done	Bull	NFSv4 performances do not depend on the local file-system used
IV.C.2	Test performance with Ext2 on server with metadata /acls	IOZone/FFsB
IV.C.3	Test performance with ext3 on server with metadata / acls	IOZone/FFsB	New
IV.C.4	Test performance with Reiser3 on server with metadata / acls	IOZone/FFsB	New
IV.C.5	Test performance with xfs on server with metadata / acls	IOZone/FFsB	New
IV.C.6	Test performance with jfs on server with metadata / acls	IOZone/FFsB	New
IV.C.7	Test performance with Reiser4 on server with metadata /acls	IOZone/FFsB	New

IV.D Test perfomance on different cluster filesystems

ID	test	tool test	status	owner	notes
IV.D.1	Test performance when using GFS cluster file system		New
IV.D.2	Test performance when using Luster cluster file system		New
IV.D.3	Test performance when using GPFS cluster file system		New
IV.D.4	Test performance when using Polyserve cluster file system		New

IV.E Evaluation in various load scenarios

ID	test	tool test	status	owner	notes
IV.E.1	Test performance with large numbers of small (<4k) files	addhoc tool	In progress	Bull	While most NFS functionnalities are not affected by the number of files (1 000 000 of empty files), some bash functions are not responding : ls (answer take more than 15 hours). This question will be splited in sub topics soon.
IV.E.2	Test performance with a few very large (>1G) files	IOzone	Open	Bull	Goals need some clarifications
IV.E.3	4-16 clients generating high load on 1 server in lab environment	Mail/user dir	New	Bull
IV.E.4	2000-5000 clients on 5-10 servers in production environment	Clusters	New	NetApps
IV.E.5	NFS "Cluster" scenario with 1000+ clients and several servers	Film industry, HPC or visualization workload	New
IV.E.6	NFS front end with cluster backend; 100+ clients		New
IV.E.7	Pure cluster; 100+ clients		New

Evaluation in stress scenarios

ID	test	tool test	status	owner	notes
IV.F.1	Measure performance of server when in limited resource situations : Low memory / heavy swap space usage High inode count situations		New
IV.F.2	Measure performance of client when in limited resource situations : Low memory / heavy swap space usage Low/saturated network bandwidth		New
IV.F.3	Graceful failure mode		New		See Chuck for more info
IV.F.4	Measure memory/network/CPU efficiency of client for fixed workload	IOzone - FFsB	In progress	Bull

Scalability (performance)

ID	test	tool test	status	owner	notes
IV.G.	Verify server scalability with clients generating various basic requests (ACCESS, GETATTR, et al)	Iozone	New
IV.G.2	Verify server scalability with clients using compound requests	Iozone	New
IV.G.3	Measure effects of scaling up number of connections	IOZone	New	Bull	SMP - Measure number of mounts per second on client and server
IV.G.4	Measure effects of increasing number of files	Addhoc tool	Open	Bull
IV.G.5	Measure effects of increasing file size (with/without cache)	IOzone	Open	Bull
IV.G.6
IV.G.7
IV.G.8
IV.G.9
IV.G.10