Albireo Virtual Data Optimizer (VDO) on DRBD

TL;DR: Pairing DRBD with VDO reduces the replication network and storage utilization by ~85% while increasing load by ~0.8.

VDO (Virtual Data Optimizer)[1] is a ready-to-run software package that delivers block-level deduplication, compression, and thin provisioning capabilities to Linux. VDO operates inline at a 4 KB granularity, delivering the best possible balance of performance and data reduction rates.

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Persistent and Replicated Docker Volumes with DRBD9 and DRBD Manage

drbdmanage has been replaced by LINSTOR.

You find more information about LINSTOR:

https://www.linbit.com/en/products-and-services/linstor/

 

Thank you and have a fun read!

 

 

Nowadays, Docker has support for plugins; for LINBIT, volume plugins are certainly the most interesting feature. Volume plugins open the way for storing content residing in usual Docker volumes on DRBD backed storage.

In this blog post we show a simple example of using our new Docker volume plugin to create a WordPress powered blog with a MariaDB database, where both the content of the blog and the database is replicated among two cluster nodes. Read more

RDMA Performance

As promised in the previous RDMA post, we gathered some performance data for the RDMA transport. Read and enjoy! Read more

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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