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Distributed SSD cache for network storage

Our small computing cluster has 3 computing nodes and 1 file server. The file server has around 70TB data to be accessed by the 3 computing nodes. All of the 3 computing nodes have 3 4TB SSDs which ...
Leo's user avatar
  • 21
0 votes
1 answer
35 views

Does the data size of an SSD chip have compatibility issues with certain boards?

I'm considering getting an 8TB SSD storage chip for my Intel NUC mini-server (I install linux on it). However, I'm wondering if there are any considerations one needs to take when adding that much ...
Patrick Collins's user avatar
0 votes
1 answer
649 views

Hyper-V: Benefit of Putting Virtual Hard Disks and Virtual Machines Folders on Separate Drives

Hyper-V has two folders 'Virtual Hard Disks' and 'Virtual Machines', the first stores the virtual disks themselves and the latter stores settings, snapshots, etc. Is there's benefit of storing these ...
AlexVPerl's user avatar
  • 217
0 votes
0 answers
135 views

Ubuntu expand free disk space after RAID change

maybe someone can advise how to expand free disk space to SDA6 part? Before I have used 2x960GB SSD (Hardware RAID1), now I have added +2x960GB SSD and made Hardware RAID10 (1+0). Problem is now that ...
zte813's user avatar
  • 3
1 vote
1 answer
2k views

Unlock SATA SSD locked with Dell's HDD password option in BIOS

Latest problem is a locked SATA disk. It is a Samsung 870 QVO SSD. It has been locked a long time ago with the Dell BIOS password utility. But because an admin password was set, the system never ...
Earl Hughes's user avatar
1 vote
1 answer
692 views

HP ProLiant DL380 G7 (P410i) compatible drives

I have recently been looking to do an upgrade on my server recently by upgrading to using SSDs (2.5 inch). I have done a lot of late night googling and have found that many drives have an issue with ...
Toffee's user avatar
  • 42
0 votes
1 answer
1k views

fio numjobs & iodepth Values to Simulate Database PostgreSQL Workload?

I am trying to benchmark a ZFS RAID-10 array of SATA SSDs using fio with settings that are somewhat representative of database workloads like for PostgreSQL. For example, for random reads: fio --...
Nyxynyx's user avatar
  • 1,459
4 votes
1 answer
2k views

Slow RAID performance for Samsung EVO's

So I've been suspecting performance bottlenecks on a Samsung EVO 850 RAID1 for sometime, but honestly been too lazy to look into it. Now I was starting a new home project, involving a Vmware ESXi host ...
Sharza's user avatar
  • 51
74 votes
13 answers
48k views

SSD or HDD for server

Issue I have read many discussions about storage, and whether SSDs or classic HDDs are better. I am quite confused. HDDs are still quite preferred, but why? Which is better for active storage? For ...
genderbee's user avatar
  • 891
6 votes
1 answer
8k views

Poor write performance of software RAID10 array of 8 SSD drives

I have server with Supermicro X10DRW-i motherboard and RAID10 array of 8 KINGSTON SKC400S SSDs; OS is CentOS 6 # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdj3[9](S) ...
Evgeny Terekhov's user avatar
0 votes
1 answer
194 views

SSD Raid perfomance

Disks: 10xSSD Ultrastar SS200 960GB 12GB/s Raid 0, 6, 10. Controller: LSI Syncro 9380-8e Filesystem: ext4 without LVM System: Centos 7 2x E5620 @ 2.40GHz 32GB RAM fio-2.1.10: --iodepth=32 --ioengine=...
shallrise's user avatar
2 votes
4 answers
4k views

RAID 5 for SSD drives.

I am planning to deploy a cost efficient yet performant SAN/NAS setup for our main office. Use cases: storage for a 20-30 user VDI deployment, file server, primary backup location. Required usable ...
Laucktba's user avatar
  • 305
1 vote
2 answers
5k views

SSD hardware RAID as local VMWARE datastore

i plan to buy a new ESXi VSphere Server with a LSI Megaraid Controller and 8 x Intel S3520 SSDs. Hypervisor should be started from USB-Flashdrive Hardware RAID10 containing 8 x Intel S3520 SSDs ...
kallegr's user avatar
  • 11
-2 votes
2 answers
2k views

Use SSD to buffer a storage Hard Drive [closed]

I have a specific storage server plan in mind. I want to use a SSD to buffer all data that I want written to a hard drive. The data would be written to the SSD, but copied to the HDD aswell. Kinda ...
niraami's user avatar
  • 105
1 vote
0 answers
38 views

Arrays removed by removing one disk?

I had an issue this weekend with a server at work, one of the Datastores (Raid1 2x300GB) on esxi filled up and the guest OS got suspended, we had nothing to attach an NFS to the esxi and all disk ...
Guizado's user avatar
  • 13
-1 votes
4 answers
595 views

Moving to SSD storage from Platters: Where does RAID come in?

When moving to SSD, do you keep RAID10? We have a server with internal SAS disks in a big array: 16x600GB RAID 10 This gives us ~4.6TB of storage. It is fast (this is SQL Server). Our SQL ...
Jonesome Reinstate Monica's user avatar
5 votes
2 answers
1k views

ZFS L2ARC for Mirror Pool

I was reading up on L2ARC for my ZFS. I currently have two Pools, One for Data, and the other for Linux Containers and Virtual Machines. I would like some help with L2ARC, I know how to add it but was ...
Jonny's user avatar
  • 53
0 votes
1 answer
688 views

How to calculate storage working set for sizing SSD/Flash size for tiered storage?

How would you calculate the size of the working set of storage that would live in a SSD/Flash tier of a tiered/hybrid storage solution? This would be used to gauge the size of the SSD/Flash tier. By ...
Sim's user avatar
  • 1,858
0 votes
1 answer
71 views

What does fast small block random reads and writes do for enterprise SSD?

Since I don't have a background in hardware storages, I've read some articles to learn about the comparison between consumer and enterprise SSDs. I'm confused of what makes enterprise SSDs perform ...
user avatar
1 vote
1 answer
3k views

Selecting an SSD to act as boot volume in an HP server

A question I recently asked regarding the use of enterprise 10k vs. 7.2k midline SAS disks led to some suggestions that the use of a mirrored pair of SSDs as a boot volume can make sense because: ...
dbr's user avatar
  • 1,852
9 votes
2 answers
4k views

Are bcache and/or dm-cache considered stable for production in 2016?

I would like to use linux SSD caching (dm-cache or bcache) with Debian Jessie production servers. (kernel 3.16) My question: Are dm-cache and bcache modules reliables in linux 3.16 ? Do I need to ...
sligor's user avatar
  • 93
2 votes
2 answers
3k views

Does the max-80%-use target suggested for ZFS for performance reasons apply to SSD-backed pools?

The Solaris ZFS Best Practices Guide recommends keeping ZFS pool utilization below 80% for best performance: Keep pool space under 80% utilization to maintain pool performance. Currently, pool ...
user's user avatar
  • 4,375
1 vote
0 answers
275 views

dmcache - is removing cache device without suspending safe?

I'm using plain dmcache for SSD cache - unmount procedure goes this way: umount fs suspend cache device remove cache device close lvm close LUKS shutdown However sometimes dmsetup doesn't allow me ...
Lapsio's user avatar
  • 363
-1 votes
4 answers
712 views

load balance across several SSDs in a server

I would like to have a volume spanning several SSDs or HDDs in my server. When I write a file to this volume, the file is written in whole to one of those drives chosen randomly or in round robin ...
wick's user avatar
  • 147
1 vote
2 answers
904 views

RAID 6 - any write amplification in 4-drive RAID?

We're planning to move from a 4-drive RAID6 to a SSD RAID 1, and I was analyzing smartctl data to see how many GB we've writen to the drives over the past year so I can estimate the lifetime of the ...
sa289's user avatar
  • 1,318
-3 votes
1 answer
209 views

Consumer vs Enterprise SSD [closed]

I'm deciding what SSD's to use in our infrastructure. Enterprise drives are obviously more reliable but storage items are expendable and will fail anyway. So considering that we have proper RAID, ...
Poma's user avatar
  • 1,299
-5 votes
1 answer
593 views

HP's $1,000 RAID Controller is outclassed by on-board raid? [closed]

HP's $1,000 Smart Array P822 controller is outclassed by an on-board raid controller. I'm having a hell of a time trying to figure this one out. My problem is that performance on the HP controller is ...
DrWhy's user avatar
  • 11
4 votes
3 answers
21k views

What are the pros & cons of 4xSSD(512Gig) in a RAID10 vs. 2xSSD(1Tb) no RAID?

Lots of read and write operations that my current setup of 4xSAS15k drives in RAID10 is having made me think of a new fast storage. My server is busy with a demanding database, lots of pages, php ...
CamSpy's user avatar
  • 145
17 votes
8 answers
13k views

Understanding NVMe storage and hardware requirements

I'm a bit confused about the recent developments in PCIe-based storage, particularly as it relates to the NVMe specification and its hardware compatibility. While I've worked extensively with SSDs in ...
ewwhite's user avatar
  • 197k
2 votes
3 answers
12k views

Convert RAID from Mechanical Disks to SSD?

Any issues with converting a Mechanical Disk RAID to SSD by replacing the drives one-by-one? I couldn't find anyone online who has done this, so let's make this the place to post about it. If you ...
Ed B.'s user avatar
  • 21
3 votes
4 answers
17k views

What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?

I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
balazs's user avatar
  • 155
1 vote
2 answers
3k views

When reading SSD drive specs, what's the difference between MB/s and IOPS?

I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...
zaadeh's user avatar
  • 161
0 votes
0 answers
3k views

smartctl error end_request: I/O error, dev sdb, sector

I have a Scientific Linux 6.5 server with a RAID with SSD disks. I see several error on dmesg file but there is no alert or errors provided by the utilities of the RAID controller (LSI controller). ...
jmlero's user avatar
  • 1
0 votes
1 answer
203 views

AWS SSD Volume pricing and IO requests [closed]

I'm looking at the pricing for the new SSD storage volumes here, and I see that there is no listed charge for per 1 million I/O requests like there is with magnetic volumes. Does that mean there is ...
pguardiario's user avatar
-1 votes
1 answer
81 views

Getting ssd, should i keep the ssd cache drive

We are going to install sdd's as main hdd in all of our pc's. However, some of them already have an ssd drive that is beeing used as a cache drive. Should be keep this chace ssd? It was my though ...
rik.vanmechelen's user avatar
15 votes
2 answers
27k views

VMware ESXi SSD on RAID showing as non-ssd

I am replacing a KVM server with a ESXi server. I just installed ESXi 5.5u1 and added a data store. The new server has 4 SSD drives in RAID 6 using hardware RAID. When I added the data store VMware ...
digitaladdictions's user avatar
1 vote
1 answer
4k views

MacBooks are destroying SSDs

I'm opening this topic to find the cause of our SSD failure rate of +50%. We work with Mac (13" Macbook Pro & 13" Macbook Air), with installations of both Mac OSX Mountain Lion and Ubuntu. 90% of ...
user196611's user avatar
4 votes
2 answers
9k views

Database (MySQL) and SSD lifetime - "lot" of writes to DB

In company where I work we started using SSD for our internal 3 GB MySQL database Difference in perfomance is HUGE, which is great. What I am worried about is lifetime of SSD Writes to DB are ...
Peter's user avatar
  • 167
15 votes
3 answers
6k views

HP storage arrays - multiple channels?

Our SQL server is becoming pretty heavily loaded, and all indications point to the disk channel being the bottleneck. The current HP server has a fairly low-end array card, and we're looking to ...
KenD's user avatar
  • 1,147
28 votes
5 answers
10k views

Do I need to RAID Fusion-io cards?

Can I run reliably with a single Fusion-io card installed in a server, or do I need to deploy two cards in a software RAID setup? Fusion-io isn't very clear (almost misleading) on the topic when ...
ewwhite's user avatar
  • 197k
-5 votes
1 answer
84 views

Mix physical media for ESXi VM, or keep it all on one physical volume? [closed]

Say I have a 120GB SSD and a 2TB volume from a portion of a larger RAID6 array. I would like to spin up a Windows Server VM for purely low-impact personal use that employs a large data store in some ...
moonslug's user avatar
  • 111
163 votes
5 answers
33k views

Are SSD drives as reliable as mechanical drives (2013)?

SSD drives have been around for several years now. But the issue of reliability still comes up. I guess this is a follow up from this question posted 4 years ago, and last updated in 2011. It's now ...
hookenz's user avatar
  • 14.5k
-1 votes
1 answer
81 views

Fast storage for a server [closed]

I have created a search engine which is implemented in Java. I want to put this program to a server and test it. My program is very dependent to disk I/O and any improvements to disks would directly ...
Alireza Noori's user avatar
1 vote
1 answer
307 views

Exchange and MS CRM on SSD's

I am looking at building a server for a friends business. This would probably be a SuperMicro job to come in on a small budget, 9 series with Sandy Bridge Dual Socket 2011 26xx processors. I'm ...
Erik Funkenbusch's user avatar
5 votes
4 answers
48k views

Pros and cons of installing ESXi on a SSD vs USB flash drive?

I'm debating on doing an ESXi 4.1/5.0 installation on a USB stick or a pair of 32GB SATA II SSDs (RAID1 mirror). According to VMWare's documentation, when ESXi is booting it looks for a 4GB space for ...
osij2is's user avatar
  • 3,885
1 vote
1 answer
873 views

MySQL Cluster on SSD

We are planning to implement a four node MySQL Cluster and are considering using SSDs as the storage. We would like to get a high level of performance and very low latency on disk IO from the small ...
somecallmemike's user avatar
5 votes
7 answers
3k views

setup lowcost image storage server with 24x SSD array to get high IOPS?

I want to build let's name it a lowcost Ra*san which would host for our social site the images (many millions) we have 5 sizes of every photo with 3 KB, 7 KB, 15 KB, 25 KB and 80 KB per Image. My ...
Nenad's user avatar
  • 375
-1 votes
2 answers
144 views

Solid State Devices [closed]

Why is solid state devices not a good option to store data for a very dynamic (frequent updates) oracle database? Although for read intensive databases ssd does give a huge performance improvement.
Jack's user avatar
  • 7
1 vote
1 answer
501 views

Windows Storage Server and SSDs in Raid 0 - Slow performance

We have a computer running Windows Storage Server 2008 R2 with 6 SSD in RAID 0. This storage computer has one PCI-E with 4 Ethernet ports and we connected it to a gigabit switch to other computers ...
Rafael Colucci's user avatar
14 votes
4 answers
13k views

Quick method to determine SSD drive health?

I have an Intel X-25M drive that was marked "failed" twice in a ZFS storage array, as noted here. However, after removing the drive, it seems to to mount, read and write in other computers (Mac, PC, ...
ewwhite's user avatar
  • 197k