Browsing Posts tagged VSAN

Reading Time: 6 minutes VMware vSAN is a powerful hyperconverged solution, but sometimes still lack of some information or usability. In most cases the health engine is working well and automatically, but in other case it needs your attention and manual operation. One example is the vSAN Disk Balance alarm that sometimes happen in your cluster and bring your healt status no more “green”. This warning just indicate that that the cluster is imbalanced and there are disks that are high on space usage while others are very low, that potentially can make your cluster no more optimal.

Reading Time: 2 minutes Some weeks ago, VMware has discover a possible issue in all VMware vSAN 6.6 and 6.7 cluster, related to hot (or also cold) disk-extend operations. Applications such as databases report in-guest data inconsistency on a VMDK that has been extended while residing on VMware vSAN 6.6 and later. More information of this issue are provided in the VMware KB 58715 (Virtual Machines running on VMware vSAN 6.6 and later report guest data consistency concerns following a disk extend operation).

Reading Time: 6 minutes With the announce of the new vSphere 6.7 Update 1 you should expect also a new version of VMware vSAN (the bits are included in vSphere) and that’s it: vSAN 6.7 Update 1 (strange that has not been used the name vSAN 6.8). VMware vSAN has grown very fast in those years, not only in the number of versions (quite impressive) but also in the customers’ adoption, with more than 14000 organizations using vSAN and with a 110% growth year-over-year.

Reading Time: 3 minutes If you are using Veeam Backup & Replication with a VMware vSAN datastore you are probably following the Veeam KB 2273 (Configuration for VMware VSAN). But this guide is only limit to recommend the hot-add transport mode. So you are going to create several Veeam proxies because Veeam Backup & Replication chooses the most appropriate backup proxy to reduce the backup traffic on the VSAN cluster network. Maybe also one per host.

Reading Time: 2 minutes The vExpert vSAN program is a specific VMware vExpert (sub)programs focused on the vSAN product. The idea to have specialized groups of vExpert was to bring again (like at the origins) the vExpert program as an “elite” program. After the vExpert vSAN 2016 and 2017 lists, now VMware has just announced the vExpert vSAN 2018 new list. I was honored to part of this list again, and that’s pretty exciting, considering that I’m there from the first list.

Reading Time: 5 minutes Just one year ago, VMware has announced vSAN 6.6… now it’s the turn of vSAN 6.7, contextually of the release of vSphere 6.7 GA. VMware vSAN is the VMware’s Software Defined Storage (SDS) solution that also fits in the hyper(visor)-converged model to build a simple (to be managed) and scalable HCI solution. Although is a separate product, the core functions to implement it are already present in the vSphere versions making really easy to deploy and enable it.

Reading Time: 2 minutes VMware vSAN should manage better VM snapshots compared with traditional storage and VMFS datastores. The reason is the new (v2) on-disk format in VSAN 6.0 and the new filesystem that is used: VirstoFS. VirstoFS is the first implementation of technology that was acquired when VMware bought a company called Virsto a number of years ago. Also there is a new sparse format called vsanSparse. These replace the traditional vmfsSparse format (redo logs).

Reading Time: 3 minutes VMware vSAN provides both enterprise-class scale and performance supporting a wide variety of use cases and businesses of all types and sizes. One of the popular use cases for VMware vSAN is running Business-Critical Applications (BCA). But in this case it’s not only running some workload in a virtual environment, but it’s also provide reference architecture, proven configurations and also the ability to use specific functions, like guest clustering.

Reading Time: 3 minutes After replacing the SAS card on some ESXi 6.5 nodes, I’ve got a strange issue in the vSAN cluster. The vSAN was healthy and apparently working, but when I try to build new VMs wasn’t working at all, saying that there weren’t enough resources. But there was a lot of free reported space. The reason was that single node, the capacity disks where simply “not Healthy”, but reported as mounted.

Reading Time: 1 minute One year ago, VMware has started new vExpert (sub)programs on different technologies. One was the vExpert vSAN. I was honored to part of the first list. Now the list for 2017 vExperts who received the vSAN award has been published. The program is build upon the vExpert program. To apply you must be a current vExpert as well as evangelizing VMware Virtual SAN. There will be an application once per year for each of the sub-programs.

Reading Time: 2 minutes The new VMware Virtual SAN (or vSAN) 6.6 adds several enchaments and new features as described in the announce notes. Some interesting news are related to security aspects and how data-at-rest could be protected: one option could be new vSphere 6.5 VM encryption format but now it’s also possible use the native vSAN encryption. Duncan’s post explains the difference of those two approaches.

Reading Time: 3 minutes The new VMware Virtual SAN (or vSAN) 6.6 adds several enchaments and new features as described in the announce notes. Most of those aspects are related to data and cluster resiliency (as expected by a storage solution), including:

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