2 RAID1 SAS 146Gb 15k RAID10 or 4 SATA 160G 7.2 k


Warning: count(): Parameter must be an array or an object that implements Countable in /home/styllloz/public_html/qa-theme/donut-theme/qa-donut-layer.php on line 274
0 like 0 dislike
34 views
Hi all! Interested in this question, can approach RAID10 on SATA 160G 7.2 k speed and reliability to RAID1 on the 2 146Gb 15k SAS in two versions: software and hardware RAID. Almost the same volumes and relatively the same price, but SATA even with 4 disks is cheaper... is There any reason to use them... the Scope of the web server!
by | 34 views

3 Answers

0 like 0 dislike
Not enough data. The volume of the base, the ratio of the number of write requests and read (this is for storage excluding cache), amount of RAM...
\r
SATA is cheaper at the expense of slightly less speed (IOPS) and slightly lower reliability (discs will fly more often). The differences between software and hardware raids have minor and only noticeable at very high volumes of requests.
\r
Eventually when you start to assess these differences with respect to the ultimate value, they often aren't worth it.
\r
p.s. now in the configuration of the high-loaded systems, it is time to add solid-state drives, and don't forget about the cost of their periodic replacement.
\r
p.p.s. if the volume of the base completely fit into the RAM, all the expensive bells and whistles you can throw and place the storage in the RAM (of course take care of the redundancy if at all possible)
by
0 like 0 dislike
1GB base! it is minuscule, certainly not forgotten about file storage, pictures, videos, etc?
\r
Without any questions — post in the dev completely, then configure replication to disk (I hope your database it will) otherwise, a periodic backup (unreliable) or finished little projects before replication (90% of cases is to add a couple of lines in classes work with databases, but then for restore you need to pre-write something).
\r
Hence the high storage requirements no — you probably have enough SATA (it is not clear why it was about RAID10 is a minimum of 4 disks, 2 of them in the mirror, the speed this adds, or rather the linear velocity is increasing, but IOPS is not)
by
0 like 0 dislike
once drove for test: sas 15k in the mirror vs 12 scsi disks, revving don't know, probably 7200, in 10m RAID.
DBMS marked out the space, build the indexes (where the truth was 15k was Itanium against the Opteron).
in tests who was raped disk — speed read/write of small blocks, marking devices (Ala formatting), single-threaded entry (backups) -15k drives did their older and slower brethren.
simultaneous copying many large files — there raidcontroller scsi overtaken.
by

Related questions

0 like 0 dislike
2 answers
0 like 0 dislike
3 answers
0 like 0 dislike
7 answers
asked Mar 24, 2019 by at88
0 like 0 dislike
5 answers
0 like 0 dislike
7 answers
asked Mar 26, 2019 by StrangeAttractor
110,608 questions
257,186 answers
0 comments
27,943 users