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Questions tagged [fragmentation]

File system fragmentation is the inability of a file system to lay out related data sequentially (contiguously), an inherent phenomenon in storage-backed file systems that allow in-place modification of their contents.

In computing, file system fragmentation, sometimes called file system aging, is the inability of a file system to lay out related data sequentially (contiguously), an inherent phenomenon in storage-backed file systems that allow in-place modification of their contents.

File system fragmentation increases disk head movement or seeks, which are known to hinder throughput.

Source: wikipedia

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IPv4 Fragmentation over ethernet

I was under the assumption that fragmentation only happens at the router however this makes me wonder how datagrams get to the router without first being fragmented at the source to comply with the MTU of ethernet.
Prisoner
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Could MFT fragmentation be a problem on my busy file server?

Windows Server 2003 SP2 LUN mounted from SAN Millions of small files across hundreds of thousands of directories (100GB total) NTFS with 4k cluster size While doing the initial file crawl for backups or archiving regular user access to files on this…
ss2k
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SSH connection problems through OpenVPN tunnel (“TCP Previous segment lost”)

I have a VPN tunnel to an OpenVPN server. The VPN is a Sophos VPN which uses OpenVPN under the hood. I do not know the server configuration nor can I change the server config. My tunnel endpoint is tun on Win 10 (OpenVPN 2.4.8) and its config looks…
divB
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xfs_db reports high file fragmentation where VM is located, but VM shows almost no fragmentation

I have several libvirt VMs stored on xfs partitions and am using gluster to replicate the storage. The VMs use qcow2 for storage. Some of the partitions where the VMs are located indicate high file fragmentation when I run xfs_fb. But the VMs show…
user3889271
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How accurate are Diskeeper's claims that fragmentation causes crashes, aborted bootups and other mayhem?

A white paper published by Diskeeper Corporation states at page 3 that, The most common problems caused by file fragmentation are: a) Crashes and system hangs/freezes b) Slow boot up and computers that won't boot up c) [...] d) File…
Dan Dascalescu
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ZFS disk with Postgresql fragmenting quickly with write-heavy application

I am running a write-heavy application where I am storing my Postgresql on ZFS. Generally, it works well, but I am finding that my ZFS pool is fragmenting heavily. I even created a new ZFS pool and moved the data there using zfs send / recv, in…
Jason
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How to fix ws and socket.io memory leak?

I have read that there is a memory leak occurring in both node.js websocket modules ws and socket.io. It has existed for years and am wondering how to fix it. It is mentioned in the following, to name a…
Normajean
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Why can't I rebuild some SQL Server indices?

I've got a table in my SQL Server 2005 database with two indices that are heavily fragmented (33.3% and 85.7%). The table looks like the following: CREATE TABLE [dbo].[Seasons]( [SeasonID] [bigint] IDENTITY(1,1) NOT FOR REPLICATION NOT NULL, …
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How to block incoming IPv6 fragments?

I have an issue with my firewall configuration. I would like to block all IPv6 fragmented packets in a sopecific interface. So, I tried: # ip6tables -A INPUT -d -i eth0 -m ipv6header --header ipv6-frag --soft -j DROP But IPv6…
belabrinel
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xfs_fsr reports insufficient freespace on large VM images

I have several systems using glusterfs and xfs partitions. Some of these systems are hosts for VMs (using libvirt and with qcow2 for storage). I noticed that there was some substantial fragmentation in several cases so I ran xfs_fsr to defrag. Two…
user3889271
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Is Windows able to run Disk Optimize with SQL Server running?

I've just inherried a SQL Server, where the database file growth was set to 1MB. So there are a lot of databases (>25) that have grown in small increments until now (currently totalling 300 GB). So I thought the hard disk must be really fragmented,…
Henrik Staun Poulsen
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Refs: is fragmentation ok / is defragmentation needed?

I run ReFS in two configurations: In a storage spaces mirror (2x4TB), for most valuable data Standalone on a single disk, for offsite backups (NB: not my only backup) In both of these configurations the data integrity features have been enabled in…
Tim
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How is Win32_DefragAnalysis FilePercentFragmentation Calculated

SCOM 2007 R2 added a fragmentation analsysis health check that is producing warnings on many of my servers. To try to understand how SCOM is determines the fragmentation level, I created the following Powershell script that reproduces the same…
Chad Miller
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verisign error -> Query to DNSKEY timed out or failed

I am trying to find the origin of an error I cannot get rid of on the verisign dnssec debugger Verisign debugger Dig queries the server just fine dig ex-mailer.com ANY @108.61.190.64 All of my logs are clean and error free in debugger mode Log…
mine
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Will 2 heavy, simultaneous IO operations result in fragmentation?

I'm using Ubuntu 14.04 to run a web/DB server. Disks are in a RAID6 set, using XFS. I'm somewhat new to XFS. Suppose I have 2 heavy IO operations. In my example: Reindexing a 400 GB database. Copying over a 500 GB backup, consisting of 5000…
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