If you can use either NVRAM hardware, use the NVRAM-NVSIMM for the Prestoserve cache. The NVRAM-NVSIMM and SBus hardware are functionally identical. However, the NVRAM-NVSIMM hardware is slightly more efficient and does not require an SBus slot. The NVRAM-NVSIMMs reside in memory and the NVRAM-NVSIMM cache is larger than the SBus hardware.
The NVRAM-NVSIMM Prestoserve NFS accelerator significantly improves the response time of NFS clients with heavily loaded or I/O-bound servers. To improve performance add the NVRAM-NVSIMM Prestoserve NFS accelerator to the following platforms:
SPARCserver 20 system
SPARCserver 1000 or 1000E system
SPARCcenter 2000 or 2000E system
You can use an alternate method for improving NFS performance in Sun Enterprise 3x00, 4x00, 5x00, and 6x00 systems. This method is to upgrade NVRAM in the SPARCstorage Array that is connected to the server.
Sun Enterprise 3x00, 4x00, 5x00, and 6x00 server systems enable SPARCstorage Array NVRAM fast writes. Turn on fast writes by invoking the ssaadm command.