SATA can give you great throughput as long as the reads\writes are sequential and very large (and very little fragmentation is present). This isn't the same as performance, as that implies latency...
As for the VIF question: the default is IP based - this means the filer will specify all outbound connections from certain IPs over certain physical interfaces. You can change this to 'rr' or round-robin which will allow traffic to be sent out of all interfaces in a round-robin fashion. However, this is only good for reads, not writes: the switch controls how data is sent _to_ the filer. Some switches will allow this type of round-robin behavior to the filer.
Overall, multithreaded applications would work best. Placing all of the volumes in their own aggregates is not a very good idea: the whole point of an aggregate is to 'aggregate' the disk I/O or bandwidth together for all the volumes to utilize. 60MB/s from 12-13 data disks isn't too bad for WAFL for some workloads - but depends on how sequential the data is and how large the blocks are.
Glenn
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Dekhayser Sent: Monday, March 19, 2007 12:39 PM To: k.weber@science-computing.de; toasters@mathworks.com Subject: RE: Throughput on 3020
Knut:
One shelf of SATA disks will *never* give you performance. It's meant for density, for low-performance requirements.
Also, keep in mind that a given TCP connection/transfer will only work on one physical interface of a multi-mode VIF at a time; so 60MB/s is pretty close to the 75MB/s practical GB/e limit for a single connection. Perhaps if you tried two transfers at once the number would improve.
Glenn (the other one)
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Knut Kristan Weber Sent: Monday, March 19, 2007 11:29 AM To: toasters@mathworks.com Subject: Throughput on 3020
Hello,
this is my first posting to this list.
A customer of us has a NetApp 3020 with 3 S-ATA shelfes each filled with 500 GB disks. He has a trunked 2*1 GBit network connection.
He has 3 volumes, each volume resides on a different aggregate built from the disks of one shelf each.
Via NFS he gets a perfomrance of sustained 60 MB per second with large and small files. Only one connection used during the test, no aditional traffic on the system and network segment. He expected the performance to be "much" better.
Besides any possible calculations - what´s the performance he can expect in real world practice under best circumstances?
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with kind regards ______________________________________creating IT solutions
Dipl.-Chem. Knut Kristan Weber
Senior Systems Engineer CAx Professional Services
science + computing ag Hagellocher Weg 73 phone +49 7071 94 57 473 72070 Tübingen, Germany fax +49 7071 94 57 411 http://www.science-computing.de
The trouble with doing something right the first time is that nobody appreciates how difficult it was.