Max number of files in latest DART version

These are documented in the Technical Guidelines section of the DART Release Notes for your release – which you can find on Powerlink

Rainer

Thanks Rainer, I find the technical section that you mentioned. There is an entry "Total number files/directories opened per Data Mover" but it just mentioned NS350/500/700 & NSX but no NX4. Can I assume the number for NX4 is about the same?

Yes, since the NX4 actually uses the same data mover as the NS-120

Hi,

keep in mind this is the number of simultaneous "opened" files on the Data Mover, and not the total number of files whitin the file system.

This will depend on the number of available inodes on the file system that is determined by the "number of bytes per inode" option when creating the file system. The default is 8k.

After creating the file system, the server_df output will show you it's capacity, and the server_df -i will show the number of inodes.

Gustavo Barreto.

Or simple use the number "Maximum number of files and directories per Celerra file system" = 256 Million (default)?

Thanks Gustavo.

Does it mean if I use default inode size 8KB and create a 16TB FS (which is the max supported according to the guide), the max files (plus folders) that can be created is:

16*1024*1024*1024/8 = 2147483648?

To get that may you first need to set a pram like ufsinodelimit – by default we only create inodes for 4TB worth of data

I would suggest to look if you really need that many inodes – you would have to store only files <8k – even a few larger file will “free up” many inodes

Rainer

It's fine even to use 4TB filesystem as there are only <30 million files & folders in current file servers.

Keep in mind there are additional advertised hard and soft/recommended limits that could affect the number of files/folders in your environment. 

As you pointed out, there is a (default) maximum 256 million total files and folders:

However, keep the following hard limit in mind:

Subdirectories (per parent directory) = 65,533

Also, take in consideration the following soft/recommended limits:

Number of files per directory = 500,000 (Exceeding this number may cause performance problems)