Chapter 6. Creating Access to Volumes

Warning

Do not enable the storage.fips-mode-rchecksum volume option on volumes with clients that use Red Hat Gluster Storage 3.4 or earlier.
Red Hat Gluster Storage volumes can be accessed using a number of technologies:

6.1. Client Support Information

6.1.1. Cross Protocol Data Access

Because of differences in locking semantics, a single Red Hat Gluster Storage volume cannot be concurrently accessed by multiple protocols. Current support for concurrent access is defined in the following table.

Table 6.1. Cross Protocol Data Access Matrix

  SMB Gluster NFS NFS-Ganesha Native FUSE Object
SMB Yes No No No No
Gluster NFS (Deprecated) No Yes No No No
NFS-Ganesha No No Yes No No
Native FUSE No No No Yes Yes [a]

6.1.2. Client Operating System Protocol Support

The following table describes the support level for each file access protocol in a supported client operating system.

Table 6.2. Client OS Protocol Support

Client OSFUSEGluster NFSNFS-GaneshaSMB
RHEL 5UnsupportedUnsupportedUnsupportedUnsupported
RHEL 6SupportedDeprecatedUnsupportedSupported
RHEL 7SupportedDeprecatedSupportedSupported
RHEL 8SupportedUnsupportedSupportedSupported
Windows Server 2008, 2012, 2016UnsupportedUnsupportedUnsupportedSupported
Windows 7, 8, 10UnsupportedUnsupportedUnsupportedSupported
Mac OS 10.15UnsupportedUnsupportedUnsupportedSupported

6.1.3. Transport Protocol Support

The following table provides the support matrix for the supported access protocols with TCP/RDMA.

Table 6.3. Transport Protocol Support

Access Protocols TCP RDMA (Deprecated)
FUSEYes Yes
SMB Yes No
NFSYesYes

Warning

Using RDMA as a transport protocol is considered deprecated in Red Hat Gluster Storage 3.5. Red Hat no longer recommends its use, and does not support it on new deployments and existing deployments that upgrade to Red Hat Gluster Storage 3.5.3.

Important

Red Hat Gluster Storage requires certain ports to be open. You must ensure that the firewall settings allow access to the ports listed at Chapter 3, Considerations for Red Hat Gluster Storage.
Gluster user is created as a part of gluster installation. The purpose of gluster user is to provide privileged access to libgfapi based application (for example, nfs-ganesha and glusterfs-coreutils ). For a normal user of an application, write access to statedump directory is restricted. As a result, attempting to write a state dump to this directory fails. Privileged access is needed by these applications in order to be able to write to the statedump directory. In order to write to this location, the user that runs the application should ensure that the application is added to the gluster user group. After the application is added, restart gluster processes to apply the new group.