6500 CSM-S and HTTP compression

Is there any plans for the 6500 CSM-S module to support http compression along with ssl offload and SLB features?

John,
No plans at this time, due to the CSM not having the CPU power to do so.
The CSS product line with version 8 code and integrated ssl module now has this feature.
Peter

Similar Messages

ADF and HTTP compression

Hello!
The customers compain that the their ADF application is not running as fast as their favorite sites (some of the customers have slow internet connection). We all know that the framework is rather heavy (the app is made with jdev 11.1.1.2.0), so is there any chance to speed it up with the http compression?
I need to figure out if ADF is compression-safe. If so, then how to enable the http for the application? Is there a specific weblogic filter, or I can use any such filter I found in the net?
Would I better use in-front Apache for this kind of job? Is there any documentation on how to set up the compression for the app, or maybe somebody has a positive experience that one can share?
Regards,
Eugene

Hi again,
I successfully patched the GZIPFilter to work with ADF Faces.
I found where and what the filter problem related to /faces/* URL is. It is related to the internal implementation of the Faces Servlet, which flushes the response's output stream before any real output has been written yet. In this way the response headers are flushed to the output stream before a header "Content-Encoding: gzip" has been added (which is done first time when some real output is written to the output stream). You can patch the GZIPFilter to support ADF Faces as follows:
1) Modify the method GZIPResponseWrapper.flushBuffer() as follows:
public void flushBuffer() throws IOException {
    if (debug) p("flushBuffer");
    if (gstream == null) return;
    response.setHeader("Content-Encoding", "gzip"); // This line is added
    gstream.flush();
    super.flushBuffer();
}2) Modify the method GzipServletOutputStream.init() as follows:
private void init() throws IOException {
    if (os != null) return;
    response.setHeader("Content-Encoding", "gzip"); // This line is modified from addHeader() to setHeader()
}3) Map the GZIPFilter to /faces/* URL-pattern in web.xml (not to the Faces Servlet, because there is some problem when the mapping is to the servlet instead of an URL-pattern);
4) Move the GZIPFilter before any other servlet filters in web.xml.
There is another one problem. There are some ADF Faces images accessed under the URL /faces/resources/images/*. If you map the servlet filter to the /faces/* URL-pattern (or to the Faces Servlet), then the filter will try to compress these images too. The problem is that the images are in "compressed" formats, so additional compression would be unnecessary overhead. The URL-pattern in filter mappings in web.xml does not allow specifying exclusions, so if you specify /faces/*, you will include these images too. To workaround this you can modify the method GZIPFilter.doFilter() to check the URI in order to avoid double-compressing the images:
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    HttpServletResponse res = (HttpServletResponse)response;
    HttpServletRequest req = (HttpServletRequest)request;
    if (req.getAttribute(WL_GZIP_FILTER) != null
        || req.getRequestURI().startsWith("/faces/resources/images", req.getContextPath().length()))) // This line is added
      chain.doFilter(request, response);
      return;
}Dimitar

CSS to CSM migration and http health checking

Hi All,
I hope someone can help me here.
We are migrating number of web services to new DC and I have some issue migrating load balancing from CSS 11501 to CSM module in 6509 within new environment.
Here is config from CSS:
content WS1
vip address 192.168.1.125
add service 192.168.1.105-80-web1
add service 192.168.1.115-80-web2
port 80
protocol tcp
balance leastconn
active
service 192.168.1.105-80-web1
ip address 192.168.1.105
keepalive port 80
keepalive uri "/URIDirect_Default.aspx"
keepalive method get
keepalive type http
keepalive hash "44baffe2618ba829a6b14ad9bccfdcf4"
active
service 192.168.1.115-80-web2
ip address 192.168.1.115
keepalive port 80
keepalive uri "/URIDirect_Default.aspx"
keepalive method get
keepalive type http
keepalive hash "f41469e68c42273622774ec706e3ddcf"
active
With this config CSS uses URI health check to determine whether or not the app live on the nodes of the farm (CSS checks for certain file's existing in app's home folder by checking the hash value of the file name - I beleive so). This is also handy for windows team which remove/rename checked file on server when want to remove it from web farm.
However, reading manuals for CSM I can not see http health probe checking for hash, but only for return status.
Can someone help me with how can I replicate above configuration using CSM.
Regards,
Sasa

Sasa,
the hash corresponds to a hash of all the text contained in the html page.
This is to guarantee that the page was not modified.
This is some kind of security in case a hacker would alter your pages.
The CSM does not have this feature.
But honestly, you usually get more troubles with this option than benefits.
If the Apps team wants to have the server down while changing files, they can I guess turn off the server themselves before doing changes. And then re-enable after.
Gilles.

CSM-S and Servers On same 6500

Is it possible to have the servers you are trying to load balance connected directly into the same chasis as the csm-s is in? Or do I have to run policy routing or what is the best design for this? Thanks.

As Gilles wrote earlier, it is very important is to guarantee that the response from the server goes through the CSM-S and not directly to the client. If you are using CSM-S in onearm mode then you can introduce PBR to make sure that the return traffic from servers passes through the CSM-s
client vlan10 (1.1.1.0)
|
|
V
MSFC-------------->CSM-S (vlan30 3.3.3.1)
|
|
V
Vlan20 (2.2.2.0)
|
|
V
Server (2.2.2.100)
For the above topology you will need to use following on MSFC.
route-map xyz permit 100
match ip address xyz-acl
set ip next-hop 3.x.3.x
ip access-list extended xyz-acl
permit tcp host 2.2.2.100 eq www any
interface Vlan20
ip policy route-map xyz
You need to create seperate vlan between CSM and SSL daughter card.
You can find details at
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/mod_icn/csm/csms/icn/ssl_srvc.htm
Thanks
Syed Iftekhar Ahmed

What are the required settings to enable HTTP Compression?

I am running into download speed issues with some of my clients. I am looking for ways to improve download response without having to rewrite my system(s).
On the server side, I am using CF 8.01 on a W2003 system. I have enable HTTP Compression for the web site in IIS 6.0 for both static and dynamic files.
On the client side where I am doing my testing, I am using IE 8.0 on a W7 professional system. In I.E., I have enabled HTTP 1.1 under advanced options and am using Automatic mode as the download methodology for Temporary Files.
It is my understanding that there is nothing that I have to do to CF to enable HTTP Compression.
It does not appear to work because the downloaded cfm files (5717 and 694389) are the same size regardless of these setting. In addition, I am using HttpWatch to determine all of the time and size parameters for each request. HttpWatch tells me in the summary that there are no HTTP Compression savings; i.e., HTTP Compression saving: 0 bytes. Based upon some of the info I've read on the web, I would have expected 50% to 75% savings since the two files being downloaded are both dynamic text files. All of the graphics, javascript, css files are cached so they do not figure into the equation.
Is there something else beyond the IIS and IE settings that needs to be done to implement HTTP Compresssion???
Thanks in advance for your suggestions/help.
Len

Adam,
I have read the references and may now be confused, but it seems to me that just doing the standard IIS Manager setup, which is what I've done, will not compress CFM files since the only things that are compressed under dynamic files are exe, dll and asp.
One would think that CF should have added CFM to the list of compressed dynamic files when it was installed as it does with default.cfm, but maybe I'm expecting too much.
If I am correct about this, then it would seem that I'm going to have to customize the compression setup as described in this quote from the reference,
"Specify additional file types to compress. Edit the ... HcScriptFileExtensions metabase property (for dynamic files) to apply compression to additional file types."
Am I misunderstanding this document???
Len

WebService Client - how to enable HTTP Compression

Hi
I have written a simple WebService Client. The WebService expects that the WebService clients enable HTTP compression. This is the exact text from the docs:-
""1. Client should be HTTP Compression enabled
HTTP Compression had been made mandatory for API�s. Thus API�s client should
include �Accept-Encoding: zip� header as part of request and should be able to
handle compressed data. Please note that system will send an error message if client
are not http compression enabled saying client should be compression enabled."
I do not know how to enable HTTP compression in the WebService Client. The method called is "GetInstantaneousFlowData". It accepts no arguments and returns xsd:datetime.
The wsdl can be found at:-
http://energywatch.natgrid.co.uk/EDP-PublicUI/PublicPI/InstantaneousFlowWebService.asmx?WSDL
Can someone please help :-
import javax.xml.rpc.ServiceFactory;
import javax.xml.rpc.Service;
import javax.xml.rpc.Call;
import javax.xml.rpc.ParameterMode;
import javax.xml.namespace.QName;
import java.util.Calendar;
public class TestNGPubTime4 {
public static void main(String[] args) throws Exception {
     // Setup the global JAX-RPC service factory
     System.setProperty( "javax.xml.rpc.ServiceFactory", "weblogic.webservice.core.rpc.ServiceFactoryImpl");
// create service factory
ServiceFactory factory = ServiceFactory.newInstance();
// define qnames
String targetNamespace = "http://www.NationalGrid.com/EDP/BusinessEntities/Public/";
QName serviceName = new QName(targetNamespace, "InstantaneousFlowWebService");
QName portName = new QName(targetNamespace, "InstantaneousFlowWebServiceSoap");
QName operationName = new QName("http://www.NationalGrid.com/EDP/UI/GetInstantaneousFlowData",
     "GetLatestPublicationTime");
// create service
Service service = factory.createService(serviceName);
// create call
Call call = service.createCall();
// set port and operation name
call.setPortTypeName(portName);
call.setOperationName(operationName); // add parameters
     call.setProperty(Call.SOAPACTION_USE_PROPERTY, Boolean.TRUE);
     call.setProperty(Call.SOAPACTION_URI_PROPERTY, "http://www.NationalGrid.com/EDP/UI/GetInstantaneousFlowData");
//     call.setProperty(Call.ENCODINGSTYLE_URI_PROPERTY, "http://schemas.xmlsoap.org/soap/encoding/");
call.setReturnType(new QName( "http://www.w3.org/2001/XMLSchema","datetime") );
// set end point address : soap address location
call.setTargetEndpointAddress("http://energywatch.natgrid.co.uk/EDP-PublicUI/PublicPI/InstantaneousFlowWebService.asmx");
// invoke the remote web service
Calendar result = (Calendar) call.invoke(new Object[] {});
System.out.println("result=" + result);
}

Rishika,
Thanks for your reply.
Could I get clariffication on some more thing?
I am using Axis 1.4 version. And I am able to implement the gzip while doing the following steps.
1) Change the pivote value to CommonsHTTpSender.
<transport name="http" pivot="java:org.apache.axis.transport.http.CommonsHTTPSender"/>
2) public class RetreiveReservationsSOAPBindingStubLocal extends RetreiveReservationsSOAPBindingStub.
I Override the method to support GZIP.
org.apache.axis.client.Call _call = super.createCall();
call.setOperation(operations[0]);
_call.setUseSOAPAction(true);
_call.setSOAPActionURI("retreiveReservations");
_call.setEncodingStyle(null);
call.setProperty(org.apache.axis.client.Call.SENDTYPE_ATTR, Boolean.FALSE);
call.setProperty(org.apache.axis.AxisEngine.PROPDOMULTIREFS, Boolean.FALSE);
call.setProperty(HTTPConstants.MCACCEPT_GZIP, Boolean.TRUE);
call.setProperty(HTTPConstants.MCGZIP_REQUEST, Boolean.TRUE);
call.setSOAPVersion(org.apache.axis.soap.SOAPConstants.SOAP11CONSTANTS);
_call.setOperationName(new javax.xml.namespace.QName("", "retreiveReservations"));
super.setRequestHeaders(_call);
super.setAttachments(_call);
Object resp = call.invoke(new Object[] {retreiveReservationsRequest});
I am able to send and receive the request and response in gzip encoded format.
Now my clarrification is,
Is it possible to set the piote value to CommonsHTTPSender for the transport http through my code?
How could I set the values from code?
Reason is, I don't want to manually edit the axis 1.4's client-config.wsdd
Since this is very critical thing, please please help me.
Thanks in advance.
Regards,
Nishad Ponery

Performance tuning with HTTP compression

We currently are using Oracle 11g and IE8. The 11g UI has been pretty slow and when i looked up for perfomance tuning one of the methods was http compression as stated in the link below -
http://blogs.oracle.com/pa/entry/obiee_11g_user_interface_ui
The portion of the above information of the has been actually except from Oracle Support ID (1312299.1).
Now I have made the changes as suggested but am wondering how can i test it to make sure the changes have surely improved the performance or not. It doesnt talk of any testing or verification methods.

Just curious , what is the compression ratio ..?
i mean by how much does the volume come down when the records are moved from F to E tables.
also is the time spend on compression of the Cube or on the aggregates or on the deletion of records in the F table..?
what is the ratio of aggregate volume to the cube volume...?
You might want to set an trace on the compression session to get answers on where it is spending most of its time
Compression is equivalent to executing a query on the F table and summarising the results with the request ID column , appending the results to E table and deleting the compressed request from F table.
Thanks.

HTTP Compression causes HTTP2228: Response content length mismatch

Dear All,
My application use iPlanet 6.1, recently we have enabled HTTP compression for the webserver.
Which inturn does not picking up style sheet and results with bad look and feel on front end.
On the back iPlanet logs we see some errors like
warning (23569): for host xxx.xxx.xxx.xxtrying to GET /zbank2/css/zbank.css, finish-response reports: HTTP2228: Response content length mismatch (315 bytes with a content length of 945)
Could you please help to resolve this problem
Thanks,
Jude

Can you send your css file? I tried it on Web Server 7.0 update 3 seems to be working fine.
I made a css file from [http://www.w3.org/Style/Examples/011/firstcss|http://www.w3.org/Style/Examples/011/firstcss]
$cat mystyle.css
body {
padding-left: 11em;
font-family: Georgia, "Times New Roman",
Times, serif;
color: purple;
background-color: #d8da3d }
ul.navbar {
list-style-type: none;
padding: 0;
margin: 0;
position: absolute;
top: 2em;
left: 1em;
width: 9em }
h1 {
font-family: Helvetica, Geneva, Arial,
SunSans-Regular, sans-serif }
ul.navbar li {
background: white;
margin: 0.5em 0;
padding: 0.3em;
border-right: 1em solid black }
ul.navbar a {
text-decoration: none }
a:link {
color: blue }
a:visited {
color: purple }
address {
margin-top: 1em;
padding-top: 1em;
border-top: thin dotted }
$cat myhtml.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
<head>
<title>My first styled page</title>
<link rel="stylesheet" href="mystyle.css">
</head>
<body>
This is style.html
</body>
</html>$cat obj.conf
<Object name="default">
AuthTrans fn="match-browser" browser="*MSIE*" ssl-unclean-shutdown="true"
NameTrans fn="ntrans-j2ee" name="j2ee"
NameTrans fn="pfx2dir" from="/mc-icons" dir="/export1/wsNov4/iplanet/ias/server/work/B1/SunOS5.8_DBG.OBJ/lib/icons" name="es-internal"
PathCheck fn="uri-clean"
PathCheck fn="check-acl" acl="default"
PathCheck fn="find-pathinfo"
PathCheck fn="find-index-j2ee"
PathCheck fn="find-index" index-names="index.html,home.html,index.jsp"
ObjectType fn="type-j2ee"
ObjectType fn="type-by-extension"
ObjectType fn="force-type" type="text/plain"
Service method="(GET|HEAD)" type="magnus-internal/directory" fn="index-common"
Service method="(GET|HEAD|POST)" type="*~magnus-internal/*" fn="send-file"
Service method="TRACE" fn="service-trace"
Output fn="insert-filter" filter="http-compression" type="text/*" vary="on" fragment-size="8096" compression-level="6"
Error fn="error-j2ee"
AddLog fn="flex-log"
</Object>
<Object name="j2ee">
Service fn="service-j2ee" method="*"
</Object>
<Object name="es-internal">
PathCheck fn="check-acl" acl="es-internal"
</Object>
<Object name="cgi">
ObjectType fn="force-type" type="magnus-internal/cgi"
Service fn="send-cgi"
</Object>
<Object name="send-precompressed">
PathCheck fn="find-compressed"
</Object>
<Object name="compress-on-demand">
Output fn="insert-filter" filter="http-compression"
</Object>Sent a request, but I didn't see any errors
[07/Nov/2008:12:58:53] finest (22021): GET /mystyle.css, func_exec reports: executing method="(GET|HEAD|POST)" type="*~magnus-internal/*" fn="send-file" Directive="Service"
[07/Nov/2008:12:58:53] finest (22021): GET /mystyle.css, func_exec reports: executing fn="insert-filter" filter="http-compression" type="text/*" vary="on" fragment-size="8096" compression-level="6" Directive="Output" magnus-internal=""
[07/Nov/2008:12:58:53] fine (22021): inserted filter http-compression
[07/Nov/2008:12:58:53] finest (22021): GET /mystyle.css, func_exec reports: fn="insert-filter" filter="http-compression" type="text/*" vary="on" fragment-size="8096" compression-level="6" Directive="Output" magnus-internal="" returned 0 (REQ_PROCEED)
[07/Nov/2008:12:58:53] finest (22021): GET /mystyle.css, func_exec reports: method="(GET|HEAD|POST)" type="*~magnus-internal/*" fn="send-file" Directive="Service" returned 0 (REQ_PROCEED)...ssltap shows the response was encoded :
--> [
GET /mystyle.css HTTP/1.1^M
Host: ....
User-Agent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.8.1.2) Gecko/20070225
Firefox/2.0.0.2^M
Accept: text/css,*/*;q=0.1^M
Accept-Language: en-us,en;q=0.5^M
Accept-Encoding: gzip,deflate^M
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7^M
Keep-Alive: 300^M
Connection: keep-alive^M
Referer: http://.../myhtml.html^M
Cookie: SUN_ID=129.147.37.51:287861225347735; s_vi=[CS]v1|48F6E7BF00000316-A02082200000556[CE]; nfTimeStamps=19700101000000%7C19700101000000%7C19700101000000; nfSettings=112101110%7C%7Cen_US%7C%7C0%7C60%7C-1%7C%7Cweek%7C-1%7C; location=US;
s_cc=true; s_sq=%5B%5BB%5D%5D; AMAuthCookie=AQIC5wM2LY4SfczkxcjsoIVQbGnnqbFrqk8lWxYT1xzFVlE%3D%40AAJTSQACMDI%3D%23^M
^M
<-- [
HTTP/1.1 200 OK^M
Server: Sun-Java-System-Web-Server/7.0^M
Date: Fri, 07 Nov 2008 07:28:53 GMT^M
Content-type: text/css^M
Last-modified: Fri, 07 Nov 2008 07:20:29 GMT^M
Etag: W/"277-4913ec3d"^M
Content-encoding: gzip^M
Vary: accept-encoding^M
Transfer-encoding: chunked^M
^M
165^M
^_\213^H^CU\222\301N\3030^L\206\357{
^K\256\313\2641!A8q^Z'^N^[/\3406nk-M\252$\355\250\320\336\2354)l\315\245\262^?\307\376?\247\205U#\374\254:T\212M-4UA\302nG\355[\314V\326^DQa\313z\224p \353j\3065<|qK^^>\351^BG\333\242yX\307\322|\222\262^FO\216\253\251Ai\265u^R\272\336u\232\246D\201\345\271v\2667J\314\332\243zQ\270Wp]\365zcp(\320%G\232}^P>\214\232D^X;\222`\254I-f\253^R\266S\324b4e\346\240\263\236^C\333^Xb\341\255\356C\272^Pl'\341)^S\315|9\270\260
\215\204Wj\343\364f\227\306.\220?H^O^T\270\214\320^G24\304\357\273c\3247\340SoNh\2748R\335kt^Q}\212^R\377\202Hs\352~\303\227pi8\373\373G\330<G'\333%\343f\237\275^V\326)r\302q\335d\210\200\254\240\320\261\345b^T\246I\201\276\203PTZ\207y#\323\372b^]J\315\346\234J\346^G(t\237\205\201\343\366H\335k\371\341&U)G\336'-\373^Ui\255\363&\377~\237\373\334\3548\245B\303^F\224^MS\373\353j\365^K O\2450w^B^M
0^M
^M
]

One integration scenario Many target system and Outgoing compressed data

I have some theoretical questions about XI usage.
At first, I'm not quite sure about the following thing: for example we have a corporate system and a lot of mobile computers (let's name them "clients") with installed small databases. Number of clients is not constant, but integration scenario is one for all of them. Next, if we add new client we must add new technical system, business system, communication channel, configure scenario, add required receiver and interface determination, and so on and so on. If we remove client we also must do all these steps. In this case, is it possible in XI (anywhere) to automate these procedures of scenario configuration? For example create something like business system template with communication channels or have one business system and a lot of communication channels in one integration scenario (in this way I suppose that message will be delivered to target system on the message content-based routing) and quickly activate/deactivate this channels (in fact receiver determination).
At second, we know that XI can receive and send compressed data if client initiates communication with XI. Anybody know about reverse functionality, when XI initiates communication with target system and compresses data (on the understanding that target system is able to receive and handle compressed data). If anybody know that is possible - can you navigate me to this information?
Thank you for help,
Best regards.

Hi Maxim,
You dont need to create techn and bus systems in SLD for your clients as you can use business services. Of course you have to create a comm channel for every client (receiver address is individual!). Receiver determination and interface determination can be configured dynmamicly with wild cards (*). You can find receivers by condition of payload content.
If you want to change this conditions very quickly (with a customizing table) you can use following trick: Use a ABAP mapping which is reading that table. Unfortunately the message is first routed and then mapped. So you have to send the message over http adapter back to XI, where the changed message is now routed by a condition. Of course a quite complex scenario, the monitoring is even more complex bcoz doubled no of messages (no performance problem - http adapter is never a bottleneck).
Regards,
Udo

Sony - when will you step up to fix A7r and lossy compression?

Sony - Nikon was sued for their D600 issues. Why not do the right thing and address the A7r and lossy compression? You have a number of experts discussing the A7r shutter shock and Sony's lossy compression scheme and not yet a response from Sony. Sony advertises that their cameras provide 14 bit color but the Sony compression algorithm never delivers more tha 8 bits of color depth according to file sizes. This is deceptive and may amount to fraud. Users want a camera that at the least provides an option for TRUE 14 bit color depth (even at the expense of frames per second) and a software update that eliminates shooting in the shutter range where shutter shock and blur are an issue. http://www.josephholmes.com/news-sonya7rshuttershake.html http://blog.kasson.com/?p=4674 http://diglloyd.com/blog/2014/20140212_2-SonyA7-RawDigger-posterization.html http://diglloyd.com/blog/2014/20140116_1-Sony-A7R-shutter-vibration.html

I'm interested in the upcoming A7S, before releasing it I hope, this time you make sure: 1) There is no light leaks of any kind, whatsoever. 2) Implement same kind of anti-shutter-shock 2s delay as in Olympus OM-D EM5 has in firmware, if you can't fix the shutter vibrations mechanically. 3) Provide a way to store truly lossless raw (should be easier with the smaller 12mpx sensor, maybe..?) Just ask some of the professionals who have wined about these issues have a go with the A7S before release to make sure it doesn't have these or some other similiar issues that hurts your reputation after release.. Tnx

SAP Java lib for SOAP: is there any chance to use HTTP-compression?

We use 3rd party web service in java, they plan to use HTTP-compression to save the bandwidth. At the moment I have no idea how to turn it on in SAP Java libs for SOAP.
Any help will be appreciated.

Hi Kirill,
HTTP-compression is something, which occurs at the HTTP protocol level (transparent and below the SAOP protocol) and is controlled by HTTP protocol headers.
To enable HTTP-compression, you will "somehow" have to manipulate the http layer of the SAP SOAP stack.
Good starting point to look for further information is the NWDS help. Use the search topics "header compress".
Regards
Gregor

WAAS and IIS Compression

Is it better to leave Microsft IIS 6/7 HTTP compression enabled on a website or is the performance better over the WAN if it's disabled and the WAE/WAAS's are allowed to accelerate.?

Hi,
I would say use the the WAE/WAAS, as the WAE is doing optimize and acceleration for the http.
Jan

Does iPlanet support http compression?

I see mention of boostweb on your site, but I understand they are recommending using a separate server rather than being installed on the same machine as iPlanet. Is anyone using HyperSpace or anything else that runs on the same server as iPlanet?
I don't like the complexity of having an additional hardware layer.

Even if iPlanet supports http compression, this will not be an adequate solution for a) some Netscape browsers (gzip bug), or b) Internet Explorer pages with <script> tags inline (browser bug).
Boostweb shouldn't be run on the same server as your webserver unless you have extremely powerful hardware (and it costs per CPU). Another alternative is a drop and go appliance like AppCelera (Packeteer's product).

Gzip HTTP Compression

Hello,
Is it possible to retrieve gzipped http compressed data in a mobile flex application? I have tried using URLLoader with no luck. I have also tried using HTTPService with no luck.
In both requests I have added the following but it doesn't seem to make a difference.
HTTPService:
httpService.headers = new URLRequestHeader('Accept-Encoding','gzip');
URLLoader:
request.requestHeaders.push(new URLRequestHeader('Accept-Encoding','gzip'));
loader.dataFormat = URLLoaderDataFormat.BINARY;
In the progress handler of URLLoader it picks up the event.bytesTotal as being correct but when the data is downloaded it is not downloading as compressed. For example the compressed data is 8.1K as reported by event.bytesTotal but URLLoader is downloading 165K as displayed by event.bytesLoaded. This makes a huge impact on application speed relating to time taken to download data over a 3G network, especially for a data hungry app. Any help on this matter would be appreciated.

Hi,
Yes, as each request pass through the IIS, everything will be compressed. And also it depends on the CPU utilization and settings done during the compression. As per the article if the CPU utilization is 90% or above compression does not performed.
https://www.nothingbutsharepoint.com/sites/itpro/Pages/SharePoint-Compression-in-IIS.aspx
Please mark it answered, if your problem resolved or helpful.

BW Http Compression

We're looking into improving performance in BW reporting and one of the things we are considering is Http Compression.
I've read note 550669 and am comfortable setting this up.
My question is concerning reasons not to do this. I always here about the positives of compression but haven't heard anything about the negatives of gotchas.
Any input is appreciated.
Thanks,
Steve

I can not really think of a good reason not to use http compression. haven't done any studies, but stuff I have seen suggests a 3 to 1 reduction in datapackets, so that should only your network happier.
It's been around for a while and is a gnerally accepted practice so you're certainly not on the bleeding edge.

6500 CSM-S and HTTP compression

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