03-12-2013
RAID 0 for SSD
Nowadays the fastest SSDs achieve read-speeds of between 1500 MB/s to 1900 MB/s. Let's say that two such SSDs in RAID 0 achieve roughly double the throughput, ie 3000 MB/s. That is only half an order of magnitude removed from RAM ((10)^(1/2) * 3000 = 10.000), very broadly speaking.
So for the price of about a twentieth of that of RAM (comparing dollar figure per GB for both RAM and SSD), I can get something which is performance-wise close to RAM.
Is anyone familiar with such a setup? Is what I have just theorised even correct?
8 More Discussions You Might Find Interesting
1. BSD
Now that SSD drives are becoming mainstream, I had a few questions on installing a SSD drive in a FreeBSD environment. Can FreeBSD be made SSD aware, that is, somehow let FreeBSD know that reads and writes should be limited or deferred to extend the disk's life? Is there a setting for wear... (0 Replies)
Discussion started by: figaro
0 Replies
2. UNIX for Dummies Questions & Answers
Hi
Can someone tell me what are the differences between software and hardware raid ?
thx for help. (2 Replies)
Discussion started by: presul
2 Replies
3. AIX
Hi,
does anyone here happen to know if I could run GLVM or GPFS on Solid State Disks?
I have a high volume / high transaction Sybase HACMP cluster currently setup with SRDF to the DR datacentre. My business now considers to move everything to SSD storage but we still need to get the data to... (0 Replies)
Discussion started by: zxmaus
0 Replies
4. AIX
Hello,
I have a scsi pci x raid controller card on which I had created a disk array of 3 disks
when I type lspv ; I used to see 3 physical disks ( two local disks and one raid 5 disk )
suddenly the raid 5 disk array disappeared ; so the hardware engineer thought the problem was with SCSI... (0 Replies)
Discussion started by: filosophizer
0 Replies
5. Solaris
Server Model: T5120 with 146G x4 disks.
OS: Solaris 10 - installed on c1t0d0.
Plan to use software raid (veritas volume mgr) on c1t2d0 disk.
After format and label the disk, still not able to detect using vxdiskadm.
Question:
Should I remove the hardware raid on c1t2d0 first?
My... (4 Replies)
Discussion started by: KhawHL
4 Replies
6. Red Hat
Hello,
I want to delete a RAID configuration an old server has.
Since i haven't the chance to work with the specific raid controller in the past can you please help me how to perform the configuraiton?
I downloaded IBM ServeRAID Support CD but i wasn't able to configure the video card so i... (0 Replies)
Discussion started by: @dagio
0 Replies
7. UNIX for Dummies Questions & Answers
Hello All,
I recently received a new SSD that I am going to use for the purpose of Booting Virtual Machines. I use VMWare Player to boot Windows Guest Operating Systems onto my Linux Laptop.
I currently have a SSD drive that I use for this exact same purpose that is formatted as ext3 and I'm... (3 Replies)
Discussion started by: mrm5102
3 Replies
8. Linux
I'm running glusterfs on CentOS 6.6 two nodes, (the SSD (samsung 840 1TB x2) is RAID 0 on the HP DL380 G6) x2, and trimming is not enable on it by checking /dev/sdb1/xxxxx/discard_max_bytes=0. Do I still need trimming? Somehow my filesystem is fine with 35-30% free space and running very fast.
... (1 Reply)
Discussion started by: itik
1 Replies
LEARN ABOUT DEBIAN
vzcalc
vzcalc(8) Containers vzcalc(8)
NAME
vzcalc - calculate resource usage of a container
SYNOPSIS
vzcalc [-v] CTID
DESCRIPTION
This utility displays the share of the host system resources a particular container is using. If the container is running, the current
usage is displayed. High utilization values (>100%) mean the system is overloaded (or the container has an invalid configuration).
Current
Shows the amount of the resources consumed by the container at a given time.
Promised
Shows the resources soft limit values "promised" for a given container.
Max Shows the resources hard limit values "promised" for a given container.
If the -v option is specified, the following additional information is also displayed:
Low Mem
The part of memory residing at lower addresses and directly accessed by the kernel (only makes sense for 32-bit architectures).
Total RAM
Total memory.
Mem+Swap
Amount of memory available for applications (both RAM and swap space).
Alloc Mem
Standard memory allocations made for applications in a container. This is a more "virtual" system resource than RAM or RAM and
swap.
Num. Proc
Number of processes.
OPTIONS
-v Display additional information.
EXIT STATUS
Normally, the exit status is 0. On error, the exit status is 1.
LICENSE
Copyright (C) 2000-2009, Parallels, Inc. Licensed under GNU GPL.
OpenVZ 10 Dec 2009 vzcalc(8)