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Special Forums Hardware Filesystems, Disks and Memory distributed filesystem over internet/VPN Post 302696103 by Domino on Tuesday 4th of September 2012 09:51:46 AM
Old 09-04-2012
distributed filesystem over internet/VPN

On this forum was already posted similar question, but it was 4 years ago and didn't give me answers.

I have two groups of engineers that works in far locations connected via VPN. Physically, the connection is a DSL. Currently we have a linux server in one location that provide files over SMB/CIFS. Thus live of people in the second location is a nightmare.

I can change a lot on the server, but one thing must remain. Workstation need to access files using standard windows mechanisms (SMB/CIFS). No extra software (drivers, clients etc).

To solve it, I want to install second server in the second location and use a distributed filessystem that mainly works in replication mode. Files on both servers will be redistributed by samba in the local network.

There is a great list of distributed filesystems on wikipedia.

The most advanced seams to be lustre. But I have some doubts if it will work for me. Lustre is dedicated to a true cluster with a high speed connection (10GigE or special hardware like RDMA). It also stripe space from all nodes, while I rather want to have replication/mirroring.

XtreemFS seams to be more adequate to me. At least from functional site. But it seams that it is JAVA based solution... I'm very afraid for the performance. There is also some limitation for read/write replication.

GlusterFS: according to some blog this filesystem is not good choice for high-latency connection like DSL. (sorry, forum disallow me to publish valid link, add http prefix: joejulian.name/blog/glusterfs-replication-dos-and-donts/)

What is your recommendation?
Had anyone similar problem?
 

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smb(4)								   File Formats 							    smb(4)

NAME
smb - configuration properties for Solaris CIFS server DESCRIPTION
Behavior of the Solaris CIFS server is defined by property values that are stored in the Service Management Facility, smf(5). An authorized user can use the sharectl(1M) command to set global values for these properties in SMF. The following list describes the properties: ads_site Specifies the site configured in DNS to look up Active Directory information. An Active Directory site is the local Active Directory NT domain name that has a different subnet controlling the Active Directory server. The value should not be set if you do not have a local Active Directory site or if the same subnet is used by the local Active Direc- tory NT domain. By default, no value is set. autohome_map Specifies the full path for the autohome map file, smb_autohome.map. The default path is /etc. ddns_enable Enables or disables dynamic DNS updates. A value of true enables dynamic updates, while a value of false disables dynamic updates. By default, the value is false. keep_alive Specifies the number of seconds before an idle SMB connection is dropped by the Solaris CIFS server. If set to 0, idle connections are not dropped. Valid values are 0 and from 20 seconds and above. The default value is 5400 seconds. lmauth_level Specifies the LAN Manager (LM) authentication level. The LM compatibility level controls the type of user authentication to use in workgroup mode or domain mode. The default value is 3. The following describes the behavior at each level. 2 In Windows workgroup mode, the Solaris CIFS server accepts LM, NTLM, LMv2, and NTLMv2 responses. In NT domain mode, the SMB redirector on the Solaris CIFS server sends NTLM responses. 3 In Windows workgroup mode, the Solaris CIFS server accepts LM, NTLM, LMv2, and NTLMv2 responses. In NT domain mode, the SMB redirector on the Solaris CIFS server sends LMv2 and NTLMv2 responses. 4 In Windows workgroup mode, the Solaris CIFS server accepts NTLM, LMv2, and NTLMv2 responses. In NT domain mode, the SMB redirector on the Solaris CIFS server sends LMv2 and NTLMv2 responses. 5 In Windows workgroup mode, the Solaris CIFS server accepts LMv2 and NTLMv2 responses. In NT domain mode, the SMB redirec- tor on the Solaris CIFS server sends LMv2 and NTLMv2 responses. netbios_scope Specifies the NetBIOS scope identifier, which identifies logical NetBIOS networks that are on the same physical network. When you spec- ify a NetBIOS scope identifier, the server is only able to communicate with other systems that have the same scope defined. The value is a text string that represents a domain name and is limited to 16 characters. By default, no value is set. Most environments do not require the use of the NetBIOS scope feature. If you must use this feature, ensure that you track the scope identifier assigned to each node. oplock_enable Enables or disables opportunistic lock (oplock) support on the Solaris CIFS server. A Solaris CIFS server grants an oplock to a client process so that the client can cache data for while the lock is in place. When the server revokes the oplock, the client flushes its cached data to the server. A value of true enables oplock support, while a value of false disables oplock support. The default value is true. Oplocks can typically be left enabled to obtain the performance benefits of client-side caching. In some circumstances, such as with some database applications, the application vendor might recommend that client-side caching be disabled to ensure that transactions are always committed immediately to the server. pdc Specifies the preferred IP address for the domain controller. This property is sometimes used when there are multiple domain con- trollers to indicate which one is preferred. If the specified domain controller responds, it is chosen even if the other domain con- trollers are also available. By default, no value is set. restrict_anonymous Disables anonymous access to IPC$, which requires that the client be authenticated to get access to MS-RPC services through IPC$. A value of true enables anonymous access to IPC$, while a value of false disables this anonymous access. The default value is false. system_comment Specifies an optional description for the system, which is a text string. This property value might appear in various places, such as Network Neighborhood or Network Places on Windows clients. By default, no value is set. wins_exclude Specifies a comma-separated list of network interfaces that should not be registered with WINS. NetBIOS host announcements are made on excluded interfaces. wins_server_1 Specifies the IP address of the primary WINS server. By default, no value is set. wins_server_2 Specifies the IP address of the secondary WINS server. By default, no value is set. ATTRIBUTES
See the attributes(5) man page for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsmbsu | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO
sharectl(1M), smbadm(1M), smbd(1M), smbstat(1M), attributes(5), smf(5) SunOS 5.11 17 Nov 2008 smb(4)
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