Discussion: What file system do you use for external backups and why?

I just got a brand new seagate 2TB hdd to act as an external backup.
I use ext2 with it, because it's USB (sata->usb enclosure), and I'm not likely to connect it direct to a PC anytime soon (also my computer is old and I liek to keep ram usage down as much as possible)...
What filesystems do you use\prefer for external backups.. and why?
Also, what type of connection do you use (USB,eSATA,etc,) and size (ie larger then a disk on key..)?

I used to use ext4 on a 1.5TB HD, but recently switched back to ext3—and a tiny NTFS partition for the ext2fsd install file. I realized I use this drive a lot more outside of my Linux environment than I thought, and it was a hassle (and also unsafe) to disable driver signatures at Windows boot just to get a dev version of ext2fsd to work.
pseudonomous wrote:If portability to other operating systems is a concern, then fat32 is, unfortunately, still the best choice, unless you have single files bigger than 4gb, which would probably mean you want to use ntfs or ext2.
While helping a friend with her external hard drive, I noticed another limitation of fat32: only 65535 file descriptors per directory. She tried to backup her entire NTFS Windows C: drive to a fat32 one. Took us a good while until we figured that out, and I couldn't find much about it on the net.

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What is the condition for using 'for all entries' and why?

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regards,
ravi.

hi,
for all entries is used to join two or more tables.
It is same as join but performance wise for all entries is more effective.
You can only use FOR ALL ENTRIES IN ...WHERE ...in a SELECT statement.
SELECT ... FOR ALL ENTRIES IN itab WHERE cond returns the union of the solution sets of all SELECT
statements that would result if you wrote a separate statement for each line of the internal table replacing the symbol
itab-f with the corresponding value of component f in the WHERE condition.Duplicates are discarded from the result
set. If the internal table itab does not contain any entries, the system treats the statement as though there were
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for example:
SELECT * FROM sflight INTO wa_sflight
FOR ALL ENTRIES IN ftab
WHERE CARRID = ftab-carrid AND
CONNID = ftab-connid AND
fldate = '20010228'.
this condition, return all entries of the sflight
hen using FOR ALL ENTRIES the number of matching records is restricted to the number of records in the internal table. If the number of records in the database tables is too large then join would cause overheads in performance. Additionally a JOIN bypasses the table buffering.
So for all entries is used for filtering out the data from the two tables based on the entries in them.
Advantages:
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What file formats should I use for maps?

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(pricy) I know that may sound strange given having CS2,
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Hi Ken,
> How much memory are you allocating to the JVM?
To be as precise as possible:
-Xms512M
-XX:SoftRefLRUPolicyMSPerMB=1
-XX:+DisableExplicitGC
-XX:MaxPermSize=192M
-XX:PermSize=192M
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What is System Change Option Used For?

Hi,
I need help on security.
we use scc4 settings for client protection. the settings are 'No changes allowed' for client-specific objects and 'No Changes to Repository and cross-client customizing objects' for cross-client object changes.
system change options are set to 'Modifiable'. what is the difference between these settings? Is there any situation that may cause problems?
thanks,
- ferudun

Hi ,
      No Changes allowed flag is explained as below
This flag means that changes in the customizing settings of the client
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However, customizing settings can be exported from the client by manual
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in the particular transaction for settings with the function Transport,
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current settings (e.g. exchange rates, posting periods) can always be
maintained in the productive client
For 'No changes to Repository and cross cleint customizing objects' explained below
   o   Changes to the Repository and cross-client Customizing permitted
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       maintained.
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   o   No change to Repository objects
       With this setting, objects of the SAP Repository cannot be
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   o   No change to Repository and cross-client Customizing objects
         Combination of both restrictions: Neither cross-client Customizing
objects nor objects of the SAP Repository can be maintained in the
client.
Please reward if useful.

What file type should i use for reading a large file of data?

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I may have memory problems.
I do not need the whole data in memory, only a few data each time, for my calculations.
If i use a binary file, i can not read only a few data. I have to load the whole file and then read the data i need.
Is this correct?
If i use another type of file, can i read only a few bytes without loading the whole file?
Maybe a TDMS file?
Solved!
Go to Solution.

I would probably use a TDMS file for this since it could also be read into excel if it were small enough - just more flexiblility. But you can also do it using binary types. You don't have to read the entire file when using binary files. See below.

[CS5] what hw configuration do you use for development?

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Do you also have tips for Mac system I should get (still stuck with 5 years old Tiger....)
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Little cheat: second start with the same plugin configuration, so the defaults and workspace are not rebuilt.
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Too bad that my focus at the moment is a 99% scripting project where speed considerations are mostly neglected.
Dirk

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If so, is there any benefit to using a 4 drive Raid 0 vs a 2 drive raid 0?
What Raid setups are any of you all using with your MacBook Pro's? Is there a significant performance difference between using a E-Sata drive and a FW800 drive. Is RAID the right way to go?
Sorry I'm not making a lot of sense right now, but I've searched through 20 or so pages of the forum and didn't see that anyone had addressed this question yet.

OK, just to give you a frame of reference, I just performed the following tests -
I hooked up my Sony AVCHD camera to my Mac Book Pro 2.4 ghz with 4 GB ram - (pretty close configuration to yours) - and imported a 26 second clip into FCP 7 with the following drive configurations:
Capture to internal Mac Drive, no externals: 26 Second clip takes 44 seconds
Capture to external WD USB2 drive: 26 Second clip takes 44 Seconds
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My conclusion would be the drives and drive throughput is not as consequential as the CPU horsepower in doing the conversion from AVCHD to Pro Res. However, there are many very knowledgeable people who look at these threads, and I would be interested to hear what they have to say.
Hope this helps.
Message was edited by: Meg The Dog to correct typo

What are you using for Fan speed AND temp monitor?

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Quote from: BOSSKILLER on 25-September-08, 00:42:40
http://www.cpuid.com/hwmonitor.php
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Discussion: What file system do you use for external backups and why?

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