Dell EMC VxFlex Ready Node R740xd - RAID Controller Virtual Disk Settings

Compo
nent
New Name (CLI) Min
Value
Max
Value
Compa
ct
High
Perfor
mance
SDS sds_max_number_asyncronous_io_pe
r_device
1 2000 8 60
SDS sds_number_sdc_io_umt 100 500 100 500
SDS sds_number_sds_io_umt 100 500 100 500
SDS sds_number_sds_copy_io_umt 100 164 164 164
SDS sds_number_copy_umt 100 164 164 164
SDS sds_number_os_threads 1 32 4 8
SDS sds_number_sockets_per_sds_ip 1 8 1 4
SDS sds_net_break_do_io_loop 0 100 0 5
SDS sds_number_io_buffers 1 10 2 5
SDS sds_net_alloc_rcv_buffer_wait_ms 100 10000 1000 1000
SDC sdc_tcp_send_buffer_size 4 128*1024 512 4*1024
SDC sdc_tcp_receive_buffer_size 4 128*1024 512 4*1024
SDC sdc_number_sockets_per_sds_ip 1 8 1 2
SDC sdc_number_network_os_threads 1 10 2 8
SDC sdc_max_inflight_requests 1 10000 100 100
SDC sdc_max_in_flight_data 1 10000 10 10
SDC sdc_number_io_retries 1 100 12 12
SDC sdc_volume_statistics_interval 1000 600000 5000 5000
SDC sdc_optimize_zero_buffers 0
(FALSE)
1 (TRUE) 0
(FALSE)
0
(FALSE)
SDC sdc_number_unmap_blocks 1 200 100 100
SDC sdc_number_non_io_os_threads 1 16 3 3
RAID controller virtual disk settings
RAID controller virtual disk settings and optimal policies regarding each type of disk.
For SSDs in use by a RAID controller
1. Create the Virtual Disk as a RAID0 device.
2. Disable the PD Cache for the HDD
3. Set the VD Caching attributes as NRWTD (No Read Ahead, Write Through,
Direct).
Note:
For VxFlex Ready Node based install, refer to the VxFlex Ready Node
documentation. The virtual disk configuration guidelines are different for
external caching solutions such as DAS Cache.
VxFlex OS performance fine-tuning
Dell EMC VxFlex Ready Node AMS User Guide 127