Requirements for watch folder
Use this information to understand the requirements for watch folder.
- RPM and package requirements
- Every node that is capable of hosting any combination of brokers, ZooKeepers, producers, and
consumers must have the following packages installed:
- GPFS™ Java™ (gpfs.java rpm/package)
- For RHEL, the librdkafka package requires the openssl-devel and cyrus-sasl-devel packages
- For Ubuntu, the librdkafka package requires the libssl-dev and libsasl2-dev packages
- librdkafka (gpfs.librdkafka rpm/package)
- Kafka (gpfs.kafka rpm/package)
- OS and hardware requirements
- RHEL 7.x on x86, RHEL 7.x on Power8 Little Endian, or Ubuntu 16.04/16.04.01 on x86.
- Linux Kernel on all platforms must be greater than or equal to 31000123.
- Minimum of three Linux quorum nodes running on approved OS and hardware (ZooKeepers).
- Minimum of three nodes to act as message queue servers (brokers) running on approved OS and
hardware.Note: The nodes acting as ZooKeepers and brokers can be the same nodes (for example, a node acting as a ZooKeeper can also take on the broker role and vice versa).
- Security requirements and limitations
- SELinux in enforcing mode is not supported. For more information about support for SELinux in IBM Spectrum Scale™, see the IBM Spectrum Scale FAQ in IBM® Knowledge Center (www.ibm.com/support/knowledgecenter/STXKQY/gpfsclustersfaq.html) and the IBM Spectrum Scale Wiki (www.ibm.com/developerworks/community/wikis/home/wiki/General Parallel File System (GPFS)).
- Root authority is required to run mmmsgqueue and mmwatch.
- The following TCP ports must be open on all nodes in the cluster:
- 2181, 9092, and 9093 along with the range 2888:3888
- GPFS file system requirements and limitations
- Watch folder can be enabled only for file systems that have been created or upgraded to IBM Spectrum Scale 5.0.2 or later with a file system version on 20.01.
- Miscellaneous requirements
- Watch folder is available in the IBM Spectrum Scale Advanced Edition or IBM Spectrum Scale Data Management Edition only.
- To use watch folder, you must first enable the watch folder feature. The watch folder feature provides a new method of monitoring and performing actions on file system events in IBM Spectrum Scale. Please contact your IBM Client Technical Specialist (or contact scale@us.ibm.com) to review your use case and receive instructions to enable the feature in your environment.
