Supported File and File System Sizes for HFS and VxFS (JFS)

Transcription

1 Technical Whitepaper Supported File and File System Sizes for HFS and VxFS (JFS) Enterprise Group, Operating Systems Technology Lab V 1.0 July 2017

2 Legal Notices The information contained herein is subject to change without notice. Hewlett Packard Enterprise (HPE) makes no warranty of any kind with regard to this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett Packard Enterprise shall not be held liable for errors contained herein or direct, indirect, special, incidental or consequential damages in connection with the furnishing, performance, or use of this material. Warranty A copy of the specific warranty terms applicable to your Hewlett Packard Enterprise product and replacement parts can be obtained from your local Sales and Service Office. U.S Government License Proprietary computer software. Valid license from HPE required for Possession, use or copying. Consistent with FAR and , Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor s standard commercial license. Copyright Notices Copyright 2017 Hewlett Packard Enterprise Development Company, L.P. Reproduction, adaptation, or translation of this document without prior written permission is prohibited, except as allowed under the copyright laws. Trademark Notices UNIX is a registered trademark of The Open Group. Intel and Itanium are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. Page 2

3 Table of contents 1 Executive Summary Hierarchical File System (HFS) Supported Sizes VxFS (JFS) Supported Sizes... 5 Related JFS Patches... 8 Related Information... 9 Page 3

4 1 Executive Summary Beginning with HP-UX 10.01, the supported sizes for files and file systems on HP- UX have gradually increased. This white paper summarizes the supported sizes for HP-UX through HP-UX 11i v3 (B.11.31). 2 Hierarchical File System (HFS) Supported Sizes Table 1 lists the maximum file and file system sizes that HFS supports. Note: Although it is possible to create files or file systems larger than these documented limits, HPE does not support such files and file systems, and the results of using them may be unpredictable. HP-UX Release Maximum Supported File Size Maximum Supported File System Size GB 4 GB GB 128 GB * 128 GB 128 GB * 128 GB 128 GB 11i V1 * 128 GB 128 GB 11i V GB 128 GB 11i V2 128 GB 128 GB 11i V3 128 GB 128 GB Table1: HFS Supported File and File System Sizes On the HP-UX 10.20, 11.00, and 11i V1 releases, you can exceed the 128 GB limit to 256 GB, but HPE does not support it. Page 4

5 3 VxFS (JFS) Supported Sizes Table 2 lists the maximum file and file system sizes that the Journaled File System (JFS) supports. JFS is also known as the VERITAS File System (VxFS). Note: Although it may be possible to create files or file systems larger than these documented limits, HPE does not support such files and file systems, and the results of using them may be unpredictable. HP-UX Release JFS Version Disk Layout Version *Maximum Supported File Size JFS 2.0 Version GB 4 GB Maximum Supported File System Size JFS 2.0 Version GB 128 GB JFS 3.0 Version 2 2 GB 128 GB JFS 3.0 Version GB 128 GB JFS 3.1 Version 2 2 GB 128 GB JFS 3.1 Version TB 1 TB JFS 3.3 Version 2 2 GB 128 GB JFS 3.3 Version TB 1 TB JFS 3.3 Version 4 1 TB 1 TB 11i V1 JFS 3.3 Version 2 2 GB 128 GB 11i V1 JFS 3.3 Version 3 2 TB 2 TB 11i V1 JFS 3.3 Version TB 2 TB 11i V1.5 JFS 3.3 Version TB 2 TB 11i V1 JFS 3.5 Version TB 2 TB 11i V1.6 JFS 3.5 Version 4 2 TB 2 TB 11iV2 JFS 3.5 Version TB 2 TB 11i V2 3, 4 JFS 3.5 Version 5 2 TB 32 TB Page 5

6 11i V2 JFS 4.1 Version 5 2 TB 40 TB 5,6 11i V2 JFS 5.0 Version 7 2 TB 40 TB 5,6 11i V3 JFS 4.1 Version 5 16 TB 32 TB 5 11i V3 JFS 5.0 Version 7 16 TB 72 TB 5,6,7,8 11i V3 JFS Version 7 16 TB 72 TB 5,7,8.9 11i V3 JFS 5.1 SP1 Version 7 16 TB 72 TB 5,7,8.9,10 11i v3 JFS 5.1 SP1 Version 8 16 TB 72 TB 5,7,8.9,10 11i v3 JFS 6.1 Version 6 16TB 32TB 5 11i v3 JFS 6.1 Version 7 16TB 72TB 5,7,8.9 11i v3 JFS 6.1 Version 9 16TB 72TB 5,7,8.9 11i v3 JFS 6.1 Version 10 16TB 512TB 11,12,13,14,15 *The file size here means the size of regular files. For directories, the maximum supported directory size is 2GB Table 2: JFS (VxFS) Supported File and File System Sizes 1 This version includes default disk layouts for particular HP-UX releases. 2 If you are extending or creating file systems beyond 128 GB, then you need PHKL_22719 to avoid mount problems. 3 With VxVM 3.5 only (not LVM) and OnLineJFS license for greater than 2 TB file system. 4 The HP-UX 11i V2 (B.11.23) September 2004 release is required to use file systems greater than16 TB. 5 Creation of greater than 2TB and lesser than 32TB file system requires OnlinejFS license. Largefiles features need to be enabled with mkfs_vxfs or fsadm_vxfs commands. Largefiles (-o largefile) is by default enabled in DLV7 onwards. 6 Creation of greater than 32TB file system requires SMO (Storage Management for Oracle) or SG-SMS (Service Guard Storage Management Suite) License. 7 72TB file system is supported on both VxVM and LVM. 8 HP has tested JFS 5.0, JFS and JFS 5.1 SP1 on HP-UX 11i V3 with file systems upto 72TB (without mirroring). Support for upto 256TB is available by contacting your HP representative. 9 OnlineJFS license on HP-UX 11iV3 JFS and later versions enables file system upto 256TB. 10 JFS 5.1SP1 only supports Disk Layout Version 8. Page 6

7 11 Creation of 512TB file system requires OnlineJFS 6.1 (B3929IB) license. OnlineJFS 6.1 enables support for creation of file systems from 2TB to 512TB. 12 JFS 6.1 and onwards supports creation of Disk Layout Version 9 and Disk Layout Version 10 is mandatory to create 512TB file systems TB file system is supported on both VxVM and LVM. 15 For creating 512TB file system, block size must be 8K. HP-UX Compatibility Notes The following sections are relevant to HP-UX versions and not applicable for HP-UX 11i v2 and 11i v3. Following are the topics covered in this section: Large File System Compatibility Issues Large Files with Memory Mapping Large File System (> 4 TB) File System Block Size Issues Related Patches Large File System (> 2 TB) Compatibility Issues The ustat system call returns information about a mounted file system. The statfs function returns status information for a mounted file system. The statvfs function returns information about a mounted file system. There is a compatibility issue involving old binaries that still use ustat, the various forms of statfs (fstatfs, statfsdev, fstatfsdev), and the various forms of the 32-bit flavor of statvfs (fstatvfs, statvfsdev, fstatfsdev). When these old binaries are exposed to a truly large file system, these calls will return an EOVERFLOW error that the binaries have never seen before. In some cases, this may be interpreted as a file being absent (some libraries and commands look at the -1 result, but not the u.uerror) or draw other incorrect conclusions. HP-provided command and library code has been updated to use the 64-bit flavor of statvfs, so rebuilt binaries should not have this problem. The bottom line is that administrators need to be aware of this when setting up their file systems. These older binaries need to be run against data that resides on smaller file systems, rather than new, huge ones that will overflow the various 32-bit status fields. Page 7

8 Large Files with Memory Mapping Use of large files in conjunction with memory mapping (via the mmap system call) requires large amounts of swap space to be configured in the system to make it perform. For example, if a 1 TB file is memory mapped by an application, the system should have between 8 to16 GB of swap space. Large File System (> 4 TB) File System Block Size Issues Large file systems (> 4 TB) require certain block size requirements. For example, in order to create a file system that is larger than 16 TB, a file system block size of 8 KB is necessary. You can obtain more information on the file system block size requirements through the mkfs_vxfs(1m) manpage. Related JFS Patches Beginning with HP-UX 10.20, HP has introduced several patches to prevent the creation or extension of JFS file systems beyond the supported maximum size. For HP-UX 10.20, these patches follow: PHCO_23035 s700_ extendfs_vxfs(1m) cumulative patch PHCO_23036 s700_ fsadm_vxfs(1m) cumulative patch PHCO_23037 s700_ mkfs_vxfs(1m) cumulative patch For the latest information about available patches, see the IT Resource Center: Go to the ITRC Web site: You must register with the ITRC to search the patch database. It is free. Click Patch Database to search for patches. Select the OS version and enter the keyword JFS to get a list of JFS patches. Page 8

9 Related Information For more information on HP-UX operating system, see the documentation available at the HP-UX Business web site ( Page 9