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Forum Discussion
Performance halved at a stroke (ReadyNAS Duo, 4.1.8) ...
In a busy few weeks, my little ReadyNAS Duo's performance seems to have halved at a stroke. The problem seems to be a consequence of upgrading to RAIDiator 4.1.8 (release) and performing a full facto...
If you are running a Mac and 4.1.7, you might want to try writing something to the NAS first. Just a very small file, etc then copy a large 1GB+ file off of it and see how its read performs then. I've have noticed that sometimes writing a file first then reading causes much better performance. I currently have a theory that there is also a bug in 4.1.7 related directly to OSX, that once all TCP connections to the NAS time out and close, when you re initiate with a read function (I.E. copy from the NAS) that it isn't negotiating Jumbo frames properly. But if you write to it first, it does negotiate Jumbo frames properly and then your read performance improves dramatically for the rest of that TCP session.
This is a phenomenon I can reliably reproduce on my Mac Pro 1,1 Lion 10.7.2 install while reading and writing to my NV+ running 4.1.7.
Like I said though this is only a current theory and I have tons of more testing to prove it. I haven't seen this phenomenon present itself on Windows 7 or Linux yet, so it seems to be OS X Lion and NV+ specific at the moment.
This is a phenomenon I can reliably reproduce on my Mac Pro 1,1 Lion 10.7.2 install while reading and writing to my NV+ running 4.1.7.
Like I said though this is only a current theory and I have tons of more testing to prove it. I haven't seen this phenomenon present itself on Windows 7 or Linux yet, so it seems to be OS X Lion and NV+ specific at the moment.
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