Recent content by sjalloq

Had this monitor since the 4th Nov and thought I'd post some thoughts. I'm using it with a Windows laptop and a Windows desktop. Laptop plugged in via TB4 and the desktop using DP and USB3.2. The display itself is lovely and I'm very happy with the extra real estate. I came from a 3440x1440...

Thanks. On the PLP point, if you have a UPS that can shutdown the server, is it as important? The cost of those SAS SSDs is far too high though. They seem to be >3X the cost of a consumer drive and I'm not sure I'm going to get anywhere near the endurance limits.

Hey, just about to buy some hardware for my next machine and wanted some advice on where to spend the cash. I'm building an all in one and wondering whether it's worth just getting more RAM or spending on an NVMe array for VM storage. I have spinning rust as my main backup/storage and want to...

Great, couldn't see the wood for the trees there. So that seems to work nicely and I'm now getting the snapshot created and backed up. At the moment my esxi VM store is a basic pool of 1 SSD. If I want to change that in the future, is the process I need to follow: delete the current pool of...

Hi, I've been trying to understand the ESXi hot snap feature of napp-it and now have it working after some experimenting. What I'd like to do now is use zfs send to back up those snapshots but I can't see an option in the napp-it UI. Is there one or do I need to script this myself?

OK, great. Understood.

OK, thanks. So there's a lot of badly worded descriptions out there then! But that really doesn't change my question. The Optane SLOG is removing the write latency associated with the ZIL so why is my randomwrite perfromance not as good? What is it about FileBench's randomwrite.f test that...

Every description I've read of the ZIL says it's a write cache. For example, this quote from ixsystems: "When synchronous writes are requested, the ZIL is the short-term place on disk where the data lands prior to being formally spread across the pool for long-term storage at the configured...

Perhaps I'm missing something here but isn't the point of using Optane to decouple the slow spinny things behind it from the write data. I've got a 20G write cache so shouldn't that be able to soak up over 20G of writes before it fills and back pressures the incoming stream?

Yes, a 3 way mirror. I was assuming these benchmarks would be small enough to be soaked up by the Optane. So am I seeing a negative effect from the underlying vdev?

Hi, I've got an AiO setup with an Optane 900P and I'd like some advice on the best setup as I'm not getting the same performance as detailed in Gea's optane_slog_pool_performance.pdf. I've got a Supermicro X9SCL with a E3-1240 V2. My OmniOS VM has 4 vCPUs, 16GB of RAM and an LSI2008 passed...

Thanks Gea, can anyone point me at some reading on how to benchmark storage and/or applications? I guess a good starting point would be to benchmark our current machine and workflows. We're running on CentOS if that makes a difference.

Hi there, looking for some system advice. I'm looking at setting up some shared storage for a mini cluster and wondered if I can do that with Napp-IT. We're going to have 3-4 compute nodes running a mixture of EDA tools and numerical simulators and I'm trying to understand how to implement...

Origin_Unknown, I have an Intel SAS8UC8i that was flashed with the LSI IT firmware. I was having no speed issues with a 6 drive raid-z2 during my initial testing. Can't remember the numbers but well over 100MB/s. As for my WD Red drives, they checked out fine during my stress testing and...

Thanks for the simple maths lesson - don't know why I didn't do it myself now. :) As for the -c switch, I found a post somewhere on the web that said the larger the number of blocks you run at once the faster it will run. I initially tried to use 4GB per instance but that segfaulted so I...