2,295 reputation
31540
bio website digitalfruition.com
location North Carolina
age 32
visits member for 3 years, 5 months
seen Apr 9 at 15:00

Chief Technology Officer and the senior software developer for Digital Fruition, LLC. I specialize in PHP, JavaScript, CSS, Ruby, Linux, Mac OS X, VMware and more.

I am an avid Stack Exchange user and a Moderator Pro Tempore on Cognitive Sciences Stack Exchange. I try to stay in our chat room almost all the time, even if I'm not at my computer. To get my attention, just post a message in chat with @Josh in it, and I'll respond as soon as I can.

I can also be reached from my website or via email at stackexchange -at- josh -dot- gitlin -dot- name. If you have an any issues please don't hesitate to contact me.


Apr
15
comment Netboot Image - Where is the user generated data stored
I use NFS over a gigabit network (without Jumbo frames) and find the performance to be quite good. Part of the trick I found was getting the Netboot Image to a decent size. We put many applications on a separate AFP share, which made NetBooting faster and also makes it easier to update those apps without having to rebuild the entire NetBoot image. Also, make sure you create the image with System Image Utility. I have had issues with images created by hand being very slow.
Apr
15
revised Netboot Image - Where is the user generated data stored
added 376 characters in body
Apr
15
comment Netboot Image - Where is the user generated data stored
That could be why, yes. The second time it was reading from there. Note that those are Sparse Files, so some of the 67GB might be a continuous string of NULL bytes, indicating none of those blocks were actually changed in the file. I forget if HFS+ stores those files efficiently or not though. I think so. (So a 67GB file might only use 3GB of space)
Apr
15
comment How to auto-run disk repair on OS X after each system crash?
You should be asking how to stop your kernel panics :-) have you run the Apple Hardware Test? Sounds like a hardware problem to me.
Apr
15
comment Netboot Image - Where is the user generated data stored
I am very familiar with the NetBoot process, so if this doesn't fully answer your question, please feel free to ask me for more details!
Apr
15
revised Netboot Image - Where is the user generated data stored
added 1083 characters in body
Apr
15
comment Netboot Image - Where is the user generated data stored
I am motivated and have engineered a system whereby everybody netboots. Their users are in open Directory and their home directories are stored on a fileserver, so that storage is persistent. But every reboot resets the system software and the installed applications (under /Applications) to the default. I find it cheaper and more reliable than other solutions for backup and re-imaging.
Apr
15
revised Netboot Image - Where is the user generated data stored
added 1083 characters in body
Apr
15
answered Netboot Image - Where is the user generated data stored
Apr
12
awarded  Nice Question
Apr
9
revised Find and remove all photos below a certain size threshhold
added 815 characters in body
Apr
9
awarded  Custodian
Apr
9
reviewed Approve suggested edit on Find and remove all photos below a certain size threshhold
Apr
9
revised Find and remove all photos below a certain size threshhold
added 53 characters in body
Apr
9
answered Find and remove all photos below a certain size threshhold
Apr
1
revised Tools to compress and encrypt files
FileVault is not a command line term; You can create a DMG which is both compressed and encrypted.
Mar
18
comment Why can't I open DMG files which reside on a read-only NFS filesystem?
Absolutely, and now I know what I need to change should I need this again in the future! (The goal previously was to place the /Library of our NetBoot image n a RAID array. We no longer need this as we purchased a new Mac Pro server)
Mar
18
comment Why can't I open DMG files which reside on a read-only NFS filesystem?
Regarding your edit, no, using both -readonly and -shadow would read from a shadow file but mount the image read-only. So for example it would allow you to read changes made to a shadow file without updating that shadow file. The issue was NFS locks as jaume discovered.
Mar
17
comment Why can't I open DMG files which reside on a read-only NFS filesystem?
No, you misunderstand. I wanted to attache a read-only image as a read-write volume with a shadow file.
Mar
16
comment Why can't I open DMG files which reside on a read-only NFS filesystem?
Thanks jaume, this worked like a charm! Unfortunately I have already found an alternative and no longer need to mount this same DMG with a shadow file, but nolocks,locallocks is helping NFS performance of other read-only NFS shares with DMG files, so thank you!