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Full Discussion: Best way to transfer files to remote FTPS server instead of local FTPS server
Top Forums UNIX for Advanced & Expert Users Best way to transfer files to remote FTPS server instead of local FTPS server Post 302999143 by rbatte1 on Wednesday 14th of June 2017 06:51:26 AM
Old 06-14-2017
Jim's suggestion is a good one, however if they are large files and you read them more than a few times, then you might just create yourself a bottleneck. For a read once on each client, then use Jim's suggestion.

Perhaps your write to the central file server would be best done with rsync so that only data that has changed gets written across the network each time you need to update it, assuming that the source file is not removed & re-written each time.

You also have to consider how your clients will behave if the file is incomplete when they try to read it. Perhaps a flag file on the central server so that the other clients will only read a file when it's present. Your write process would then need to delete/rename the flag file before it starts re-writing the data file and then recreate it when it is complete.

When you say that the files are remote, if you mean physically remote (different city/country etc.) then your biggest issue will be the network link.

Some things to consider:-
  • Where is the data source?
  • Where are the clients?
  • How much data are we talking?
  • How often will it be written?
  • How often will it be read?
  • Will a file be ignored if has not been updated?
  • What is the network like?
These need to be answered however you choose to implement this.

There are (probably expensive) technologies that can replicate data between remote sites if that is your need, but it then depends on what you have already available, e.g. SANs, ZFS/NAS, etc.


Can you expand a little more on these?




Kind regards,
Robin
 

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LEARN ABOUT SUNOS

mountd

mountd(1M)																mountd(1M)

NAME

       mountd - server for NFS mount requests and NFS access checks

SYNOPSIS

       /usr/lib/nfs/mountd [-v] [-r]

       mountd  is  an  RPC  server  that  answers  requests  for  NFS  access  information  and  file  system  mount  requests.  It reads the file
       /etc/dfs/sharetab to determine which file systems are available for mounting by which remote machines. See sharetab(4). nfsd running on the
       local  server  will  contact mountd the first time an NFS client tries to access the file system to determine whether the client should get
       read-write, read-only, or no access. This access can be dependent on the security mode used in the remoted procedure call from the  client.
       See share_nfs(1M).

       The command also provides information as to what file systems are mounted by which clients. This information can be printed using the show-
       mount(1M) command.

       The mountd daemon is automatically invoked by share(1M).

       Only super user can run the mountd daemon.

       The options shown below are supported for NVSv2/v3 clients. They are not supported for Solaris NFSv4 clients.

       -r	Reject mount requests from clients. Clients that have file systems mounted will not be affected.

       -v	Run the command in verbose mode. Each time mountd determines what access a client should get, it will log the result to  the  con-
		sole, as well as how it got that result.

       /etc/dfs/sharetab       shared file system table

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnfssu 		   |
       +-----------------------------+-----------------------------+

       nfsd(1M), share(1M), share_nfs(1M), showmount(1M), nfs(4), sharetab(4), attributes(5)

       Since  mountd  must  be	running for nfsd to function properly, mountd is automatically started by the svc:/network/nfs/server service. See
       nfs(4).

       Some routines that compare hostnames use case-sensitive string comparisons; some do not. If an incoming request fails, verify that the case
       of the hostname in the file to be parsed matches the case of the hostname called for, and attempt the request again.

								    27 Apr 2005 							mountd(1M)
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