Another hibernate question...

[helloha]

I'm using an older system with 64GB DDR2 FB dims. It turns out it sucks an enormous amount of power...

Are there any hibernate options?

I don't want to shut down because then I loose the L2 arc in my SSD and that slows things down a bit.

Thanks!
K.

 

[enemy85]

Short answer, no. You could just spin down disks but not the system

 

[cyberjock]

Now you know why FB-DIMM based systems are not recommended here. You have to eat lots of power 24x7.

 

[marbus90]

^ and FB-DIMM based systems use FSB still, which limits internal bandwidth and impacts ZFS as well.

I am considering a Bladecenter with 16 blades and 8x2GB FB-DIMMs per blade. That's 256GB of RAM in 10U, let's not bother with the CPU performance figures - they'll idle in VM workloads most of the time anyway.
Turns out, a single new 1U or 1/2U server can carry 384 or 256GB in standard 16GB RDIMMs, would in this case provide the same connectivity (2x10Gbe) - and uses less than 10% of the Bladecenters energy. ROI at 0.10USD per kWh is reached after little over 2 years at 24x7 operation.

Maybe consider a X10SRL-F with a Xeon E5 v3 and 4x16GB RDIMMs. It'll usually provide the same CPU power than your old system whilst using far less energy. ROI figures obviously vary, especially when you considered the older server as part of your heating system. In our case we don't know where to put the 100+kw of electric energy being turned into heat, so we need cooling anyway -> pushes the ROI point below 2 years quickly.