Downsides of using Proxy servers as a storage enabled node

Hello,
We are doing some investigation on proxy server configuration, I read "Oracle coherence recommends it's better to use proxy server as storage disabled".
can anyone explain downside of using proxy server as a storage enabled node?
Thanks
Prab

It seems that I was wrong with my original answer. The proxy uses a binary pass through mode so that if the proxy and cache service are using the same serialization format (de)serialization is largely avoided.
However, there are other overhead associated with managing potentially unpredictable client work loads, so using proxy server as storage enable node is still discouraged.
Thanks,
Wei

Similar Messages

EM for Coherence - Cannot automatically start departed storage enabled nodes

Hi Guru,
I have a cluster with 4 storage enabled nodes. I want EM to monitor those 4 storage enabled nodes and automatically bring up nodes if down. So i set the "Nodes Replenish and Entity Discovery Alert Metric ->
Cluster Size Change (To Replenish Nodes)" as follows:
         Warning Threshold: Not Defined
          Critical Threshold: 3
          Comparision Operator: <
          Occurrences Before Alert: 1
I manually killed 2 storage nodes and hope EM can automatically bring up them. But unfortunately, this never happen. I even cannot see the correct "Severity Message" displayed on GUI, it always shows "0 nodes departed Coherence cluster".
Did anyone have the similar problem? Any hints are appreciated!
Thanks
Hysun

Hi,
It looks like your cache servers have not used the correct cache configuration file so they do not have a service with the name DistributedSessions. You can see this in your log output here:
Services
ClusterService{Name=Cluster, State=(SERVICE_STARTED, STATE_JOINED), Id=0, Version=3.7.1, OldestMemberId=5}
InvocationService{Name=Management, State=(SERVICE_STARTED), Id=1, Version=3.1, OldestMemberId=5}
PartitionedCache{Name=DistributedCache, State=(SERVICE_STARTED), LocalStorage=enabled, PartitionCount=257, BackupCount=1, AssignedPartitions=257, BackupPartitions=0}
ReplicatedCache{Name=ReplicatedCache, State=(SERVICE_STARTED), Id=3, Version=3.0, OldestMemberId=2}
Optimistic{Name=OptimisticCache, State=(SERVICE_STARTED), Id=4, Version=3.0, OldestMemberId=2}
InvocationService{Name=InvocationService, State=(SERVICE_STARTED), Id=5, Version=3.1, OldestMemberId=2}
You said in the original post that you used the following JVM arguments:
-Dtangosol.coherence.distributed.localstorage=true -Dtangosol.coherence.session.localstorage=true -Dtangosol.coherence.cluster=CoherenceCluster -Dtangosol.coherence.clusteraddress=231.1.3.4 -Dtangosol.coherence.clusterport=7744
...but none of those specify the cache configuration to use (in your case session-cache-config.xml) so the node will use the default configuration file; the default name is coherence-cache-config.xml which is inside the Coherence jar file.
You need to add the following JVM argument
-Dtangosol.coherence.cacheconfig=session-cache-config.xml -Dtangosol.coherence.distributed.localstorage=true -Dtangosol.coherence.session.localstorage=true -Dtangosol.coherence.cluster=CoherenceCluster -Dtangosol.coherence.clusteraddress=231.1.3.4 -Dtangosol.coherence.clusterport=7744
JK

Excessive (?) cluster delays during shutdown of storage enabled node.

We are experiencing significant delays when shutting down a storage enabled node. At the moment, this is happening in a benchmark environment. If these delays were to occur in production, however, they would push us well outside of our acceptable response times, so we are looking for ways to reduce/eliminate the delays.
Some background:
- We're running in a 'grid' style arrangement with a dedicated cache tier.
- We're running our benchmarks with a vanilla distributed cache -- binary storage, no backups, no operations other than put/get.
- We're allocating a relatively large number of partitions (1973), basing that number on the total potential cluster storage and the '50MB per partition' rule.
- We're using JSW to manage startup/shutdown, calling DefaultCacheServer.main() to start the cache server, and using the shutdown hook (from the operational config) to shutdown the instance.
- We're currently running all of the dedicated cache JVMs on a single machine (that won't be the case in production, of course), with a relatively higher ratio of JVMs to cores --> about 2 to 1.
- We're using a simple benchmarking client that is issuing a combination of puts/gets against the distributed cache. The ids for these puts/gets are randomized (completely synthetic, i know).
- We're currently handling all operations on the distributed service thread (i.e. thread count is zero).
What we see:
- When adding a new node to a cluster under steady load (~50% CPU idle avg) , there is a very slight degradation, but only very slight. There is no apparent pause, and the maximum operation times against the cluster might barely exceed ~100 ms.
- When later removing that node from the cluster (kill the JVM, triggering the coherence supplied shutdown hook), there is an obvious, extended pause. During this time, the maximum operation times against the cluster are as high as 5, 10, or even 15 seconds.
At the beginning of the pause, a client will see this message:
2010-07-13 22:23:53.227/55.738 Oracle Coherence GE 3.5.3/465 <D5> (thread=Cluster, member=10): Member 8 left service Management with senior member 1
During the length of the pause, the cache server logging indicates that primary partitions are being shuffled around.
When the partition shuffle is complete, the clients become immediately responsive, and display these messages:
2010-07-13 22:23:58.935/61.446 Oracle Coherence GE 3.5.3/465 <D5> (thread=Cluster, member=10): Member 8 left service hibL2-distributed with senior member 1
2010-07-13 22:23:58.973/61.484 Oracle Coherence GE 3.5.3/465 <D5> (thread=Cluster, member=10): MemberLeft notification for Member 8 received from Member(Id=8, Timestamp=2010-07-13 22:23:21.378, Address=x.x.x.x:8001, MachineId=47282, Location=site:xxx.com,machine:xxx,process:30552,member:xxx-S02, Role=server)
2010-07-13 22:23:58.973/61.484 Oracle Coherence GE 3.5.3/465 <D5> (thread=Cluster, member=10): Member(Id=8, Timestamp=2010-07-13 22:23:58.973, Address=x.x.x.x:8001, MachineId=47282, Location=site:xxx.com,machine:xxx,process:30552,member:xxx-S02, Role=server) left Cluster with senior member 1
2010-07-13 22:23:59.135/61.646 Oracle Coherence GE 3.5.3/465 <D5> (thread=Cluster, member=10): TcpRing: disconnected from member 8 due to the peer departure
Note that there was almost nothing actually in the entire cluster-wide cache at this point -- maybe 10 MB of data at most.
Any thoughts on how we could eliminate (or nearly eliminate) these pauses on shutdown?

Increasing the number of threads associated with the distributed service does not seem to have a noticable effect. I might try it in a larger scale test, just to make sure, but initial indications are not positive.
From the client side, the operations seem hung behind the DistributedCache$BinaryMap.waitForPartitionRedistribution() method. The call stack is listed below.
"main" prio=10 tid=0x09a75400 nid=0x6f02 in Object.wait() [0xb7452000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.waitForPartitionRedistribution(DistributedCache.CDB:96)
- locked <0x9765c938> (a com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap$Contention)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.waitForRedistribution(DistributedCache.CDB:10)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.ensureRequestTarget(DistributedCache.CDB:21)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.get(DistributedCache.CDB:16)
at com.tangosol.util.ConverterCollections$ConverterMap.get(ConverterCollections.java:1547)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$ViewMap.get(DistributedCache.CDB:1)
at com.tangosol.coherence.component.util.SafeNamedCache.get(SafeNamedCache.CDB:1)
at com.ea.nova.coherence.lt.GetRandomTask.main(GetRandomTask.java:90)
Any help appreciated!

Limiting the storage enabled nodes?

A somewhat common mistake in our development environment is that developers run test programs against our test cluster and forgets to specify that the node (JVM) they start should NOT be storage enabled. This causes re-balancing or even worse (when we during development run with backup count = 0 to fit more data into our test machines limited memory) data loss in the cluster when they shut down the node by killing it.
Is there a way to limit what nodes that are allowed to be storage enabled (in the same way as one can specify the IPs of the nobes that are at all allowed to participate in the cluster)? If this was possible we could set up a test cluster were no other nodes than the intended ones are allowed to be storage enabled and any other nodes trying to contribute storage would be refused to join the cluster!
Best Regards
Magnus

There are a few improvements in 3.2 to configuration. First of all, eval / dev / prod licenses can now have specific overrides, to avoid accidentally using dev configuration in production, for example.
We also introduce a configurable "member role" in 3.2 which will eventually be used to drive configuration options (and was requested by customers to affect their own application behavior).
Peace,
Cameron.

Best practice to handle the class definitions among storage enabled nodes

We have a common set of cache servers that are shared among various applications. A common problem that we face upon deployment is with the missing class definition newly introduced by one of the application node. Any practical approach / best practices to address this problem?
Edited by: Mahesh Kamath on Feb 3, 2010 10:17 PM

Is it the cache servers themselves or your application servers that are having problems with loading classes?
In order to dynamically add classes (in our case scripts that compile to Java byte code) we are considering to use a class loader that picks up classes from a coherence cache. I am however not so sure how/if this would work for the cache servers themselves if that is your problem!?
Anyhow a simplistic cache class loader may look something like this:
import com.tangosol.net.CacheFactory;
* This trivial class loader searches a specified Coherence cache for classes to load. The classes are assumed
* to be stored as arrays of bytes keyed with the "binary name" of the class (com.zzz.xxx).
* It is probably a good idea to decide on some convention for how binary names are structured when stored in the
* cache. For example the first tree parts of the binary name (com.scania.xxxx in the example) could be the
* "application name" and this could be used as by a partitioning strategy to ensure that all classes associated with
* a specific application are stored in the same partition and this way can be updated atomically by a processor or
* transaction! This kind of partitioning policy also turns class loading into a "scalable" query since each
* application will only involve one cache node!
public class CacheClassLoader extends ClassLoader {
    public static final String DEFAULT_CLASS_CACHE_NAME = "ClassCache";
    private final String classCacheName;
    public CacheClassLoader() {
        this(DEFAULT_CLASS_CACHE_NAME);
    public CacheClassLoader(String classCacheName) {
        this.classCacheName = classCacheName;
    public CacheClassLoader(ClassLoader parent, String classCacheName) {
        super(parent);
        this.classCacheName = classCacheName;
    @Override
    public Class<?> loadClass(String className) throws ClassNotFoundException {
        byte[] bytes = (byte[]) CacheFactory.getCache(classCacheName).get(className);
        return defineClass(className, bytes, 0, bytes.length);
}And a simple "loader" that put the classes in a JAR file into the cache may look like this:
* This class loads classes from a JAR-files to a code cache
public class JarToCacheLoader {
    private final String classCacheName;
    public JarToCacheLoader(String classCacheName) {
        this.classCacheName = classCacheName;
    public JarToCacheLoader() {
        this(CacheClassLoader.DEFAULT_CLASS_CACHE_NAME);
    public void loadClassFiles(String jarFileName) throws IOException {
        JarFile jarFile = new JarFile(jarFileName);
        System.out.println("Cache size = " + CacheFactory.getCache(classCacheName).size());
        for (Enumeration<JarEntry> entries = jarFile.entries(); entries.hasMoreElements();) {
            final JarEntry entry = entries.nextElement();
            if (!entry.isDirectory() && entry.getName().endsWith(".class")) {
                final InputStream inputStream = jarFile.getInputStream(entry);
                final long size = entry.getSize();
                int totalRead = 0;
                int read = 0;
                byte[] bytes = new byte[(int) size];
                do {
                    read = inputStream.read(bytes, totalRead, bytes.length - totalRead);
                    totalRead += read;
                } while (read > 0);
                if (totalRead != size)
                    System.out.println(entry.getName() + " failed to load completely, " + size + " ," + read);
                else
                    System.out.println(entry.getName().replace('/', '.'));
                    CacheFactory.getCache(classCacheName).put(entry.getName() + entry, bytes);
                inputStream.close();
    public static void main(String[] args) {
        JarToCacheLoader loader = new JarToCacheLoader();
        for (String jarFileName : args)
            try {
                loader.loadClassFiles(jarFileName);
            } catch (IOException e) {
                e.printStackTrace();
}Standard disclaimer - this is prototype code use on your own risk :-)
/Magnus

Creating java sockets behind proxy servers.

Hi,
I am trying to create a socket to an external server(i.e. a public server) from behind a proxy firewall, but the socket creation statement throws an IO exception. Can someone please let me know how to create sockets using proxy servers.
TIA
Shishir

I tried using java.net.Proxy for the connection. But the socket to the proxy itself is not getting created. It throws the IllegalArgumentException.
import java.io.*;
import java.net.*;
import java.net.Proxy.Type;
public class Client {
static Socket proxSocket = null;
static PrintWriter out = null;
static BufferedReader in = null;
public static void main(String[] args) throws IOException {
try {
System.out.println("Trying to create socket");
InetSocketAddress proxyadd = new InetSocketAddress(InetAddress.getByName("148.87.19.20"),80);
Proxy ps = new Proxy(Proxy.Type.HTTP,proxyadd);
Socket proxSocket = new Socket(ps);
out = new PrintWriter(proxSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
proxSocket.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: ...");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for "
+ "the connection to: ...");
System.exit(1);
catch(IllegalArgumentException e)
System.err.println("Unable to describe the proxy.");
System.exit(1);
}

Disabling anonymous proxy servers

Can I find out if another user on my computer (my kid) has been using proxy servers to surf sites without my knowledge? Will Safari History indicate access to that server?
If this is occurring, can I disable the ability to do so. I don't want any anonymous surfing.

Can I find out if another user on my computer (my kid) has been using proxy servers to surf sites without my knowledge?
No. Safari doesn't keep that kind of information. If you really have some reason to believe this is being done, the best solution is to password protect your Mac so your children or anyone else cannot access it without you logging in for them.
There's nothing wrong with using anonymous proxies to surf the web; it's the content of what you think your child ma be accessing that is the problem. You cannot disable that ability. If you have no evidence to support your suspicion, then you're overreacting.
Mulder

InvocationService on storage disabled nodes

Hi,
Is it safe to assume that InvocationService tasks will not fire on cluster nodes that were started using '-Dtangosol.coherence.distributed.localstorage=false'? I've tried both 'execute' and 'query' methods on a cluster that contains both storage-enabled and storage-disabled nodes and the tasks only seem to fire on the storage-enabled nodes. The reason that I'm curious is because the InvocationService.getInfo().getServiceMembers() method returns all the cluster nodes (not just the storage-enabled nodes), and the InvocationService threads show up in the thread dumps of the storage-disabled nodes.
Thanks,
Jim

Hi Rob,
Thanks for your reply. This turned out to be an elusive problem on my end, complicated by the fact that Coherence was 'eating' an exception. One of the member fields in my invocation class was not serializable, but the InvocationService thread did not give any indication of this error. It wasn't until I put a try/catch around the InvocationService.execute method that I discovered the problem. The local node was the only storage-enabled node, so that explains why the invocation was not being executed on the storage-disabled nodes.
This might be a good candidate for a bug fix in Coherence (to log some indication that an exception occurred). As is, a good programming tip is to ALWAYS put a try/catch around InvocationService.execute() and InvocationService.query().
Jim

Coherence extend Proxy service with no storage.

Hi
I am implementing coherence where I have the requirement as follows.
1. Create two Coherence Servers in Weblogic console. These are cache stores using replicated cache scheme.
2. Create tow Coherence servers which acts as proxy. These should not contain any cache.
Can some body tell me how to create the cache config for the step2 i.e proxy servers? when I created the proxy server without giving the cache names I am getting cache not found error.

Hi Sri,
There are various options available for this but...
If I was building this application I would probably make your Web Cluster storage-disabled members of the Coherence cluster (assuming they are Java). This will give them quicker access to data than using Extend. You would then not need the proxy servers. I would use distributed caches in your Coherence storage nodes rather than replicated and then configure near-caches in your Web layer. If you wanted to you could use the resource from the servers that you were using for proxy servers as storage nodes as this would give you a little more capacity and make the cluster a little mode durable - i.e. less prone to complete failure if you lost a node.
So, your coherence-cachestore-config file would look like this
<cache-config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://xmlns.oracle.com/coherence/coherence-cache-config"
        xsi:schemaLocation="http://xmlns.oracle.com/coherence/coherence-cache-config coherence-cache-config.xsd">
    <defaults>
        <serializer>pof</serializer>
    </defaults>
    <caching-scheme-mapping>
        <cache-mapping>
            <cache-name>products</cache-name>
            <scheme-name>distributed-scheme</scheme-name>
        </cache-mapping>
    </caching-scheme-mapping>
    <caching-schemes>
        <distributed-scheme>
            <scheme-name>distributed-scheme</scheme-name>
            <service-name>DistributedCacheScheme</service-name>
            <backing-map-scheme>
                <local-scheme/>
            </backing-map-scheme>
            <autostart>true</autostart>
        </distributed-scheme>
    </caching-schemes>
</cache-config>The cache configuration for the Web layer would be similar but have near caching
<cache-config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://xmlns.oracle.com/coherence/coherence-cache-config"
        xsi:schemaLocation="http://xmlns.oracle.com/coherence/coherence-cache-config coherence-cache-config.xsd">
    <defaults>
        <serializer>pof</serializer>
    </defaults>
    <caching-scheme-mapping>
        <cache-mapping>
            <cache-name>products</cache-name>
            <scheme-name>near-scheme</scheme-name>
        </cache-mapping>
    </caching-scheme-mapping>
    <caching-schemes>
        <near-scheme>
            <scheme-name>near-scheme</scheme-name>
            <front-scheme>
                <local-scheme>
                    <high-units>1000</high-units>
                </local-scheme>
            </front-scheme>
            <back-scheme>
                <scheme-ref>distributed-scheme</scheme-ref>
            </back-scheme>
        </near-scheme>
        <distributed-scheme>
            <scheme-name>distributed-scheme</scheme-name>
            <service-name>DistributedCacheScheme</service-name>
            <backing-map-scheme>
                <local-scheme/>
            </backing-map-scheme>
            <autostart>true</autostart>
        </distributed-scheme>
    </caching-schemes>
</cache-config>The above near cache would only hold 1000 entries, and Coherence will manage expiry of this. You could tune this figure, other other expiry setting to optimize the data access for your Web layer - as described in the near cache docs here http://docs.oracle.com/cd/E24290_01/coh.371/e22837/cache_config.htm#BABGFCII Storage disbaled nodes with near caches are not always the best approach, but given you are using them in a long-live Web layer and the data does not change very often, I think they would be good for you to use.
As I said though, as with a lot of things in Coherence, there are a number of options available to you, some good, some not so good; the above option is just the one I would choose. Given the requirements you have mentioned there is actually not much wrong with the solution you have chosen apart from access to data is slower as there are always two network hops involved with the proxy in the middle and it would not scale up so well if you wanted to grow the system.
JK

Getting through proxy servers

Hello,
Does anyone know if the URLRequest / Loader classes are able
to connect through proxy servers? In other words, does Flash read
the PC's proxy configuration and automatically use it?
Also, I was wondering, if one was to create a Socket and then
connect to a web site...
mySocket.connect("www.mydoman.com", 80);
but the user's PC uses a proxy server to connect to the
Internet, would this
connection succeed or fail?
Thanks for your insight.
Dan

Check the links below out. I think it may help you out some.
http://bugs.adobe.com/jira/browse/FP-519
http://bugs.adobe.com/jira/browse/FP-673

Proxy servers and the "cannot publish" error - v.1.1.2

Using the latest iWeb (1.1.2), attempts to publish my work to my .Mac account resulted in the infamous "publish error." I then came across this KB article:
http://docs.info.apple.com/article.html?artnum=303927
I turned off my proxy access in the Network settings, and voila, publishing was successful. But now, I'm circumventing my much-needed proxy.
It's been suggested in other threads here that proxies aren't a problem if one's iDisk is accessible through it. This is not the case. With the proxy, iDisk access is fine, it's only iWeb publishing that is a problem.
Any way to keep my proxy and still publish with .Mac?

iDisk access and iWeb publishing ARE indeed different activities. They are similar in that they both utilize the WebDAV protocol over Port 80, but they are different in their individual requirements for back and forth communications with the .Mac servers in terms of how soon or in what timeframe they expect to hear confirmation of transfer back from the server.
It is apparent to me that the network timeout threshold for copying something to iDisk is a lot longer than that for publishing through iWeb. In fact, I would say that iWeb has become a lot more stringent with network timeouts ever since it was updated from 1.0 to 1.1.
Anything in between your computer and the .Mac servers contributes to network latency. There are both software and hardware contributions to this latency. Proxy servers, like routers, can be software or hardware based. Software-based latency is most often greater than hardware-based latency.
I would guess that removing any kind of latency "generating" obstacles within your control would likely improve iWeb function and decrease the incidence of publish errors. Some of these obstacles can include background processes, busy LAN activity (like VOIP use or streaming music/video or online gaming), wireless access points, proxy servers, and routers.
On the other hand, I also think that if Apple increased iWeb's network timeout threshold, that most of the publishing errors that people experience could be eliminated.

OS X Tiger and proxy servers

At the office I use my MacBook Pro connected to an exchange server. To do so I've had to use Microsoft Entourage and Firefox. I cannot get any of the Mac software (iTunes, Safari, Mail, etc.) to work with the server.
I've read previous discussions in this forum on the subject but none have helped.
How can it be that Firefox can have the simple "auto-detect proxy settings for this network" that works and the 'ahead of the curve,ease of use leader,' Apple does not?
Can anyone help me to get OSX Tiger working for me at work?

I'm not sure what you mean by vague but allow me to be more specific.
To make Entourage work I had to configure it to use an Exchange Server, an option built in to the application. I find no such option in Apple Mail.
To make Firefox access the internet I just had to choose "auto-detect proxy servers." Now it will work at the office (through the Exchange server) and at home where I'm connected directly (on a cable modem). Safari has no such option.
I understand that Apple uses System Preferences rather than each application having its own settings. I ahven't been able to get any Apple apps to connect to the internet when I'm at work. I have set up a "Location" for when I'm at work. My MBP can access the company printers, though not from every application - - Preview always works.
I see that there is a place for a PAC file url or to configure a proxy server manually. I don't have this information. The company in all PC and isn't all that concerned with helping me configure my Mac.
If there's any other way someone can recommend I'd appreciate it.
On another note, I question why Apple's set up isn't easier. Entourage and Firefox were very simple, in the case of Firefox it was automatic.

Unable to use proxy server with MAC OS X Anyconnect client

Hi All,
I have a VPN setup thru a Cisco 5520, Windows clients connect just find and the end users configure there browser to use our internal proxy servers. Users with the MAC OS X Anyconnect client can connect, they configure their Mac to use our proxy server, but the broswers will not work, clients can reach networks and resources behind the VPN gateway and have access to the Proxy(Tried a telnet to that hostname/port). Anyone run into this issue before? I am running ASA 8.3(2), Anyconnect(OS X) 3.1.01065.
Thank You

We had the same problem.
We are behind government firewall so I don't know which Cisco firewall is used but we are using AnyConnect to establish VPN from internet to LAN behind firewall. We have no problems with Windows. With Mac OS X connection through proxy didn't work with Safari and Chrome (both are using system Proxy setting), but it did work with Firefox (which has it's own Proxy).
Finally we found out that ethernet MTU size was the culprit. When we set it to manual, with size being 1347 (or less), proxy started to work.

ACE best practice for proxy servers

Dear,
I would like to know which is the best practice scenario to load balance proxy servers:
1- Best practice to have transparent proxy or proxy setting on the web browser?
2- for transparent proxy: best practice to use ip wccp or route-map pointing to the ACE VIP?
3- What are the advantages and disadvantages of transparent proxy V/S web browser proxy setting.
Regards,
Pierre

Hi,
Sorry, that seem to be an internal link.
You can also check the below post where a sample config is posted here for transparent cache.
https://supportforums.cisco.com/thread/129106
Best practice :
VIP would be a catch all address.
To optimize the caching predictor hash url is used.
You can also use mac-sticky on interface so proper flow persistence is used within ACE
The mode is transparent so we preserve the destination ip address.
Regards,
Siva

PAC file support for Proxy Servers

When will AIR support PAC files for proxy servers?
In our network, we can't point to a PAC file because the AIR app simply ignores it, and we experience comms issues because of it. The workaround is to configure the network settings to point directly at the proxy, bypassing the PAC file.
This is a big problem as pointing directly at the proxy means a lot of manual configuration for each user that requires the use of the AIR app.
Any clues or suggestions?

Hi,
Additional configurations (DHCP and DNS) are required when you use Automatically detect settings.
For details, please refer to:
Automatic Detection and Configuration of Browser Settings
http://technet.microsoft.com/en-us/library/dd361887.aspx
Hope this helps.
Jeremy Wu
TechNet Community Support

Downsides of using Proxy servers as a storage enabled node

Similar Messages

Maybe you are looking for