Testing SSD Drives with DRBD: SanDisk Optimus Ascend

This week we continue our SSD testing series with the SanDisk Optimus Ascend 2.5 800GB SAS drives.

Background:
SanDisk Corporation designs, develops and manufactures flash memory storage solutions. LINBIT is known for developing DRBD (Distributed Replicated Block Device), the backbone of Linux High Availability software. LINBIT tested how quickly data can be synchronously replicated from a SanDisk 800 GB SSD in server A, to an identical SSD located in server B. Disaster Recovery replication was also investigated, using the same hardware to an off-site server.

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Testing SSD Drives with DRBD: Intel DC 3700 Series

Over the next few weeks we’ll be posting results from tests that we’ve run against various manufactures SSD drives; including Intel, SanDisk, and Micron, to name a few.

The first post in this series goes over our findings of the Intel DC S 3700 Series 800GB SATA SSD drives. Read more

What is RDMA, and why should we care?

DRBD9 has a new transport abstraction layer and it is designed for speed; apart from SSOCKS and TCP the next generation link will be RDMA.

So, what is RDMA, and how is it different from TCP? Read more

Benchmarking DRBD

We often see people on #drbd or on drbd-user trying to measure the performance of their setup. Here are a few best practices to do this.  Read more

DRBD and SSD: I was made for loving you

When DRBD 8.4.4 integrated TRIM/Discard support, a lot of things got much better… for example, 700MB/sec over a 1GBit/sec connection. Read more

Root-on-DRBD followup: Pre-production staging servers

In the Root-on-DRBD” Tech-Guide we showed how to cleanly get DRBD below the Root filesystem, how to use it, and a few advantages and disadvantages. Now, if there’s a complete, live, backup of a machine available, a few more use-cases become available; here we want to discuss testing upgrades of production servers.
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DRBDmanage installation is now easier!

DRBDmanage has been replaced by LINSTOR !

To find out more about LINSTOR, check out the following blog articles:

  1. Cluster-wide management of replicated storage with LINSTOR
  2. The Technology inside LINSTOR (Part 1)
  3. The Technology inside LINSTOR (Part 2)
  4. How to setup LINSTOR on Proxmox VE

Thank you and have a good read!

 

In the last blog post about DRBDmanage we mentioned

Initial setup is a bit involved (see the README)

… with the new release, this is no longer true!

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DRBDManage release 0.10

USE LINSTOR!

DRBDmanage has been replaced by LINSTOR!

To find out more about LINSTOR, check out the following blog articles:

  1. Cluster-wide management of replicated storage with LINSTOR
  2. The Technology inside LINSTOR (Part 1)
  3. The Technology inside LINSTOR (Part 2)
  4. How to setup LINSTOR on Proxmox VE

Thank you and have a good read!

 

As already announced in another blog post, we’re preparing a new tool to simplify DRBD administration. Now we’re publishing its first release! Read more

DRBD-Manager

DRBDmanage has been replaced by LINSTOR !

To find out more about LINSTOR, check out the following blog articles:

  1. Cluster-wide management of replicated storage with LINSTOR
  2. The Technology inside LINSTOR (Part 1)
  3. The Technology inside LINSTOR (Part 2)
  4. How to setup LINSTOR on Proxmox VE

Thank you and have a good read!

 

One of the projects that LINBIT will publish soon[1. With an Open Source license; GIT will be the preferred way to help us.] is drbdmanage, which allows easy cluster-wide storage administration with DRBD 9. Read more