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ONTAP file and directory structure Resolution Guide

ONTAP file and directory structure Resolution Guide

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Category:: ontap-9

Specialty:: core

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Applies to

ONTAP 9
High file count environment
Maximum file count (maxfiles)
Maximum directory size (maxdir-size)

Description

Use this guide for links to concepts, common issues, and frequently asked questions of ONTAP:

Maximum directory size (maxdir-size)
Maximum file or inode count (maxfile)

Solutions

Maximum Directory Size (maxdir-size)

Concepts	How to modify the maxdir-size in ONTAP 9 Understanding the ONTAP directory size limit (Video) What are the ONTAP limitations on files, directories, and subdirectories? How to monitor and evaluate maxdir-size allocation in ONTAP? How to monitor maxdir alert at 70 percent threshold or below How to identify the current maxdir-size value for my volume?
FAQ	What is directory size? What is maxdir-size? Which directory does maxdir-size refer to? What directory structure should I use to avoid maxdir-size issues? What happens when the directory size reaches the set maxdir-size value? How do I handle a maxdir-size event? Does deleting files in a directory cause the directory size to reduce? What are the performance impacts of changing the size of maxdir-size? Do files and directories located in a snapshot affect maxdir-size calculations? Can I revert the maxdir-size value to a smaller value? Why is the size of my directory object larger after copied to a new location What is the way to deal with SNMP traps ’MaxDirSizeAlert’? Is there any alert traps or events detected before reaching maximum directory size (maxdir-size) limit? If ONTAP is upgraded will maxdir-size be increased?
EMS event	Max Directory size error - AutoSupport message
Issue	"File too large" error messages when maxdir-size limit is reached Copying, pasting, renaming files failing due to 0xC00002EA STATUS_CANNOT_MAKE Creation of new files on CIFS share fails with Error 0x8000FFFF: Catastrophic failure Modification of maxdir-size fails with error Illegal max-dir-size Rsync files from FlexVol dir to FlexGroup dir, FlexGroup generate maxdir-size error XCP copy fails and throws an nfs3 error 27: file too large Komprise directory reported wafl.dir.size.max: volume reached the maxdir-size limit When copying FlexVol dir to FlexGroup dir, get maxdir-size error

Maximum Inode count (maxfiles)

Concepts	What is an inode? What is the ONTAP inode cache? How to determine the default and maximum inode count for my volume? What happens when your volume runs out of inodes? Considerations before increasing the file count in ONTAP
FAQ	FAQ - ONTAP maximum number of inodes (maxfiles)
EMS event	What happens when your volume runs out of inodes?
Issue	Unable to set volume attribute "files" for volume: Current value is at the maximum allowable limit command failed: Unable to set volume attribute "files" for volume in ONTAP Inodes or maxfiles not increasing after using "fix" button in AIQM Maximum allowable inodes slightly lower than the specified value Inode number keeps at 21251126, which doesn't increase to desired value after volume size expansion NetApp XCP reports Error "nfs3 error 27: file too large" NDMP subtree backup of a qtree transfers significantly more data than qtree contains

Additional Information

TR-4571: NetApp ONTAP FlexGroup volumes: Best practices and implementation guide