Both Teamwork Cloud (TWCloud) and Cassandra installations are required. This section contains system requirements for installing TWCloud. The hardware requirements for Cassandra can be found here: https://wiki.apache.org/cassandra/CassandraHardware. Recommended system requirements System requirements are dictated by the intended deployment, taking into account the overall load which the environment will experience - Number of concurrent users
- Level of activity (commits) per day
- Overall number and size of the projects stored in Teamwork Cloud.
From a hardware perspective, the database (Cassandra) can be located on the same server as Teamwork Cloud, or separated into its own server. Storage requirements apply only to the node where the database is located. Ideally, the node hosting Cassandra should be a physical node, since virtualization will introduce a performance degradation. Nodes running Cassandra should have DAS SSD drives (direct attached). Best performance will be obtained using NVMe drives. Presently, there are hardware limitation on the size of the NVMe drives as well as the number of NVMe drives which can be installed on a single machine. Therefore, if the expected number and size of projects is significant, SAS SSD backed by a high speed caching controller may be a more suitable choice. For ease of maintenance and reduction of risk, we recommend that the volumes reside on RAID-1 or RAID-10. If RAID is not used, the failure of a drive will result in a downed node, impacting the enterprise. By opting to deploy on RAID volumes, a drive failure will not affect the application and will allow replacement of a drive with zero down time. Nodes hosting Teamwork Cloud nodes can be virtualized without any issues, provided the host is not oversubscribed on its resources. Nodes containing both Teamwork Cloud and Cassandra - 96 -128 GB ECC RAM
- >=16 processor threads (such as E5-1660)
- >1TB SSD DAS storage
Nodes containing only Cassandra - 48 - 64 GB ECC RAM
- >=8 processor threads (such as E5-1620)
- >1TB SSD DAS storage
Nodes containing only Teamwork Cloud - 48 - 64 GB ECC RAM
- >=8 processor threads (such as E5-1620)
- >250GB storage
Recommended minimum sizing stated above applies to each node in a multi-node cluster |
SAN Storage should not be used on Cassandra nodes for data or commitlog volumes. This will result in severe performance degradation. There is absolutely no amount of SAN tuning and OS tuning which will mitigate this. |
Minimum server system requirements - TWCloud 19.0 requires Cassandra 3.11-x
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Please see the article found at the following link for additional server recommendations for capacity and performance: http://cassandra.apache.org/doc/latest/operating/hardware.html Currently, if deploying on Amazon EC2, we recommend m5-2xlarge or r4-2xlarge instances. Depending on the workloads, you may want to go to the -4xlarge instances, but for the vast majority of users the -2xlarge will suffice.
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