SLOG on Supermicro X9DRI-F

[dturner71.dt]

Ok. So I've read up on SLOG and using an M2 SSD with cache feature is desirable. I'm not able to use an M2 SSD without buying the expensive PCIe Intel 750.

• https://www.newegg.com/Product/Prod...Dw_1Tlm0bTcmjV0UsThoCM8AQAvD_BwE&gclsrc=aw.ds

Would an Intel 750 SSD SATA be advisable or would performance be critical with the extra steps required to covert via sata?

• https://www.amazon.com/dp/B00A8NWCQY/ref=psdc_1292116011_t2_B00A8NWD68

I currently have a Samsung Evo 850 256GB SSD and a Samsung Pro 840 256GB SSD. I would of like to use one of these for a SLOG, but after reading up on performance hits, not really wanting to got that route. I will be using the EVO as a boot device for now.

Thanks guys.

Dustin

 

[Ericloewe]

It depends on what you need. The S3700 may be enough for some workloads.

I currently have a Samsung Evo 850 256GB SSD and a Samsung Pro 840 256GB SSD. I would of like to use one of these for a SLOG, but after reading up on performance hits,

It's not really about performance, it's power loss protection. Since the ZIL is needed exactly in the sort of scenario that involves a power loss, it tends to defeat the purpose of the ZIL to have an SLOG device with no PLP.

 

[tvsjr]

I run a SATA S3700 as a SLOG for my VMware NFS workload... about 40 VMs on a 12 drive array. It works well. Certainly not the fastest option, but it's all a matter of what you want to pay.

 

[SweetAndLow]

Disable sync on the dataset if you want performance gains. Add a slog if you want performance gains and power loss protection.

 

[tvsjr]

Disable sync on the dataset if you want performance gains.

Just keep in mind this puts your data at extreme risk if a power failure occurs.

 

[Ericloewe]

Depends on the application. VMs wouldn't take kindly to it at all.

 

[SweetAndLow]

Just keep in mind this puts your data at extreme risk if a power failure occurs.

Yeah exactly what I said. If you care about power failure then use a good slog device.