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• Building html structure in php or javascript?

  - by Adam

  I've been doing a lot of ajax calls and using the returned data to build html with javascript. However, I've noticed some people are returning the constructed html in the ajax calls since they're doing it all in php. What is the preferred method? I have a bunch of stuff already using javascript, so I guess I would prefer not changing everything to use just php. But, I'm assuming php would be more "secure."? The following is what I've been doing: $main_frag = $("<div class='order-container'/>"); $contact_frag = $("<div class='group'><div class='line-data'>Name: "+data.name+"</div><div class='line-data'>Email: "+data.email+"</div><div class='line-data'>Phone: "+data.phone+"</div></div>"); $address_frag = $("<div class='group'><div class='line-data'>Address 1: "+data.address_one+"</div><div class='line-data'>Address 2: "+address2+"</div><div class='line-data'>City: "+data.city+"</div><div class='line-data'>Province: "+data.province+"</div><div class='line-data'>Postal Code: "+data.postal+"</div></div>"); etc.. I just want to hear the opinions of the community.

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• SQL -- How is DISTINCT so fast without an index?

  - by Jonathan

  Hi, I have a database with a table called 'links' with 600 million rows in it in SQLite. There are 2 columns in the database - a "src" column and a "dest" column. At present there are no indices. There are a fair number of common values between src and dest, but also a fair number of duplicated rows. The first thing I'm trying to do is remove all the duplicate rows, and then perform some additional processing on the results, however I've been encountering some weird issues. Firstly, SELECT * FROM links WHERE src=434923 AND dest=5010182. Now this returns one result fairly quickly and then takes quite a long time to run as I assume it's performing a tablescan on the rest of the 600m rows. However, if I do SELECT DISTINCT * FROM links, then it immediately starts returning rows really quickly. The question is: how is this possible?? Surely for each row, the row must be compared against all of the other rows in the table, but this would require a tablescan of the remaining rows in the table which SHOULD takes ages! Any ideas why SELECT DISTINCT is so much quicker than a standard SELECT?

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• Show dialog while loading new screen

  - by darkdusky

  I have a front screen with a button which opens a second screen. The second screen can take a few seconds to load so I want to display a dialog while loading. My problem is the dialog does not display while loading second screen, but it displays when I return to first page from the second page. If I comment out the "startActivity" to open second page the dialog shows fine. I'm fairly new to android programming - I guess it has something to do with threads. //code snippet from inside onCreate: NewGame.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { //does not get displayed before 2nd page opens showDialog(DIALOG2_KEY); //shows fine if next 2 lines commented out Intent i = new Intent(screen1.this, SudukuXL.class); startActivity(i); I've dealt with the dialog showing on returning to the front screen using onPause(). I've tried using threads to seperate the dialog from the startActivity but I've had no luck. Any help would be appreciated. I used code from Android examples to create dialog. I include below for reference: protected Dialog onCreateDialog(int id) { switch (id) { case DIALOG2_KEY: { ProgressDialog dialog = new ProgressDialog(this); dialog.setMessage("Loading..."); dialog.setIndeterminate(true); dialog.setCancelable(true); return dialog; } } return null; }

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• NHibernate Native SQL multiple joins

  - by Chris

  Hi all, I"m having some problems with Nhibernate and native sql. I've got an entity with alot of collections and I am doing an SQL Fulltext search on it. So when returning 100 or so entities, I dont want all collections be lazy loaded. For this I changed my SQL query: SELECT Query.* FROM (SELECT {spr.*}, {adr.*}, {adrt.*}, {cty.*}, {com.*}, {comt.*}, spft.[Rank] AS [Rak], Row_number() OVER(ORDER BY spft.[Rank] DESC) AS rownum FROM customer spr INNER JOIN CONTAINSTABLE ( customerfulltext , computedfulltextindex , '" + parsedSearchTerm + @"' ) AS spft ON spr.customerid = spft.[Key] LEFT JOIN [Address] adr ON adr.customerid = spr.customerid INNER JOIN [AddressType] adrt ON adrt.addresstypeid = adr.addresstypeid INNER JOIN [City] cty ON cty.cityid = adr.cityid LEFT JOIN [Communication] com ON com.customerid = spr.customerid INNER JOIN [CommunicationType] comt ON comt.communicationtypeid = com.communicationtypeid) as Query ORDER BY Query.[Rank] DESC This is how I setup the query: var items = GetCurrentSession() .CreateSQLQuery(query) .AddEntity("spr", typeof(Customer)) .AddJoin("adr", "spr.addresses") .AddJoin("adrt", "adr.Type") .AddJoin("cty", "adr.City") .AddJoin("com", "spr.communicationItems") .AddJoin("comt", "com.Type") .List<Customer>(); What happens now is, that the query returns customers twice (or more), I assume this is because of the joins since for each customer address, communicationItem (e.g. phone, email), a new sql row is returned. In this case I thought I could use the DistinctRootEntityResultTransformer. var items = GetCurrentSession() .CreateSQLQuery(query) .AddEntity("spr", typeof(Customer)) .AddJoin("adr", "spr.addresses") .AddJoin("adrt", "adr.Type") .AddJoin("cty", "adr.City") .AddJoin("com", "spr.communicationItems") .AddJoin("comt", "com.Type") .SetResultTransformer(new DistinctRootEntityResultTransformer()) .List<Customer>(); Doing so an exception is thrown. This is because I try to list customers .List<Customer>() but the transformer returns only entities of the last join added. E.g. in the case above, the entity with alias "comt" is returned when doing .List() instead of .List(). If I would switch last join with the join alias "cty", then the transformer returns a list of cities only... Anyone knows how I can return a clean list of customers in this case?

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• Strangest LINQ to SQL case I have ever seen

  - by kubaw

  OK, so this is the strangest issue in .net programming I have ever seen. It seems that object fields are serialized in .net web services in order of field initialization. It all started with Flex not accepting SOAP response from .net web service. I have found out that it was due to the order of serialized fields was statisfying the order of fields in declared serializable class. It had something to do with generic lists and LINQ to SQL but I can't find out what. This one is really hard to reproduce. Example to get the idea: [Serializable] public class SomeSample { public int A; public int B; public int C; } I was querying some data tables within asmx web service using linq and returning list of SomeSample objects: var r = (from ...... select new SomeSample { A = 1, C = 3 }).ToList(); Now the list was once more iterated and B field was applied some value (ex. 2). However the returned soap envelope contained following excerpt: <A>1</A><C>3</C><B>2</B> Please notice the order of serialization. If I initially initialized all fields: var r = (from ...... select new SomeSample { A = 1, B = 2, C = 3 }).ToList(); object was serialized in correct order. I must add, that in both cases the debugger shows exactly the same content of "r" variable. Am I losing my mind or is this normal behavior? Thanks in advance.

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• AngularJS: Using Shared Service(with $resource) to share data between controllers, but how to define callback functions?

  - by shaunlim

  Note: I also posted this question on the AngularJS mailing list here: https://groups.google.com/forum/#!topic/angular/UC8_pZsdn2U Hi All, I'm building my first AngularJS app and am not very familiar with Javascript to begin with so any guidance will be much appreciated :) My App has two controllers, ClientController and CountryController. In CountryController, I'm retrieving a list of countries from a CountryService that uses the $resource object. This works fine, but I want to be able to share the list of countries with the ClientController. After some research, I read that I should use the CountryService to store the data and inject that service into both controllers. This was the code I had before: CountryService: services.factory('CountryService', function($resource) { return $resource('http://localhost:port/restwrapper/client.json', {port: ':8080'}); }); CountryController: //Get list of countries //inherently async query using deferred promise $scope.countries = CountryService.query(function(result){ //preselected first entry as default $scope.selected.country = $scope.countries[0]; }); And after my changes, they look like this: CountryService: services.factory('CountryService', function($resource) { var countryService = {}; var data; var resource = $resource('http://localhost:port/restwrapper/country.json', {port: ':8080'}); var countries = function() { data = resource.query(); return data; } return { getCountries: function() { if(data) { console.log("returning cached data"); return data; } else { console.log("getting countries from server"); return countries(); } } }; }); CountryController: $scope.countries = CountryService.getCountries(function(result){ console.log("i need a callback function here..."); }); The problem is that I used to be able to use the callback function in $resource.query() to preselect a default selection, but now that I've moved the query() call to within my CountryService, I seemed to have lost what. What's the best way to go about solving this problem? Thanks for your help, Shaun

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• Processing JSON data with jQuery - strange results needing alert()

  - by James

  I have this code below. I randomly ran across that it will work if I have that alert message exactly where it is. If I take it out or move it to any other spot the tabs will not appear. What exactly is that alert doing that allows the code to work and how can I make it work without the alert? If I move the each loop into the success section it does not work even with the alert. $.ajax({ type: "GET", url: "../ajax.php", data: "action=tabs", dataType: "json", success: function(data){ Projects = data; } }); alert("yes"); $.each(Projects, function(i){ /* Sequentially creating the tabs and assigning a color from the array: */ var tmp = $('<li><a href="#" class="tab green">'+Projects[i].name+'<span class="left" /><span class="right" /></a></li>'); /* Setting the page data for each hyperlink: */ tmp.find('a').data('page','../ajax.php?action=lists&projectID='+Projects[i].project_id); /* Adding the tab to the UL container: */ $('ul.tabContainer').append(tmp); }); The ajax code is retuning json with this code $query = mysql_query("SELECT * FROM `projects` ORDER BY `position` ASC"); $projects = array(); // Filling the $projects array with new project objects: while($row = mysql_fetch_assoc($query)){ $projects[] = $row; } echo json_encode($projects); The returning data is very small and very fast so I don't think that is the problem.

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• Watching variables in SSIS during debug

  - by Tom H.

  I have a project in SSIS and I've added an Execute SQL Task which sends its result out to a variable. I wanted to confirm the value because I was worried that it would try to write it out as a resultset object rather than an actual integer (in this case I'm returning a COUNT). My first thought was just to run it in debug mode and add the global variable to my Watch window. Unfortunately, when I right-click on the Watch window, the option to "Add Variable" is greyed out. What am I missing here? I've gotten around confirming that my variable is set correctly, so I'm not interested in methods like putting a script in to do a MsgBox with the value or anything like that. For future reference I'd like to be able to watch variables in debug mode. If there are some kind of constraints on that then I'd like to know the what and why of it all if anyone knows. The help is woefully inadequate on this one and every "tutorial" that I can find just says, "Add the variable to the Watch window and debug" as though there should never be a problem doing that. Thanks for any insight!

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• Multiple/Sub quries with codeigniter

  - by user1011713

  I just started with Codeigniter and this is driving me nuts. I have a query that determines whether a user has bought any programs. I then have to use that program's type category to run and determine how many times he or she has recorded a query in another table. Sorry for the confusion but the code hopefully makes sense. I'm having problem returning the two arrays from my Model to my Controller to onto the view obviously. function specificPrograms() { $specific_sql = $this->db->query("SELECT program,created FROM `assessment` WHERE uid = $this->uid"); if($specific_sql->num_rows() > 0) { foreach ($specific_sql->result() as $specific) { $data[] = $specific; $this->type = $specific->program; } return $data; } $sub_sql = $this->db->query("SELECT id FROM othertable WHERE user_id_fk = $this->uid and type = '$this->type'"); if($sub_sql->num_rows() > 0) { foreach ($sub_sql->result() as $otherp) { $data[] = $otherp; } return $data; } } Then in my Controller I have, $data['specific'] = $this->user_model->specificPrograms(); $data['otherp'] = $this->user_model->specificPrograms(); Thanks for any help.

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• jQuery: serializing array returns empty string

  - by John Smith

  I did not forget to add name attributes as is a common problem and yet my serialized form is returning an empty string. What am I doing wrong? HTML/javascript: <head> <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script> <script> $( document ).ready( function() { $('#word_form').submit(function(e) { e.preventDefault(); console.log($(this).serialize()); //returns an empty string }); }); </script> </head> <body> <div id="wrapper"> <form name="word_form" id="word_form" method="POST"> <input type="image" name="thumbsUp" id="thumb1" value="1" src="http://upload.wikimedia.org/wikipedia/commons/8/87/Symbol_thumbs_up.svg" style="width:50px;height:50px;"> <input type="image" name="thumbsDown" id="thumb2" value="2" src="http://upload.wikimedia.org/wikipedia/commons/8/84/Symbol_thumbs_down.svg" style="width:50px;height:50px;"> </form> </div> </body> Thanks!

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• List of Lists of different types

  - by themarshal

  One of the data structures in my current project requires that I store lists of various types (String, int, float, etc.). I need to be able to dynamically store any number of lists without knowing what types they'll be. I tried storing each list as an object, but I ran into problems trying to cast back into the appropriate type (it kept recognizing everything as a List<String>). For example: List<object> myLists = new List<object>(); public static void Main(string args[]) { // Create some lists... // Populate the lists... // Add the lists to myLists... for (int i = 0; i < myLists.Count; i++) { Console.WriteLine("{0} elements in list {1}", GetNumElements(i), i); } } public int GetNumElements(int index) { object o = myLists[index]; if (o is List<int>) return (o as List<int>).Count; if (o is List<String>) // <-- Always true!? return (o as List<String>).Count; // <-- Returning 0 for non-String Lists return -1; } Am I doing something incorrectly? Is there a better way to store a list of lists of various types, or is there a better way to determine if something is a list of a certain type?

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• Folding a list in F#

  - by bytebuster

  I have a pretty trivial task but I can't figure out how to make the solution prettier. The goal is taking a List and returning results, based on whether they passed a predicate. The results should be grouped. Here's a simplified example: Predicate: isEven Inp : [2; 4; 3; 7; 6; 10; 4; 5] Out: [[^^^^]......[^^^^^^^^]..] Here's the code I have so far: let f p ls = List.foldBack (fun el (xs, ys) -> if p el then (el::xs, ys) else ([], xs::ys)) ls ([], []) |> List.Cons // (1) |> List.filter (not << List.isEmpty) // (2) let even x = x % 2 = 0 let ret = [2; 4; 3; 7; 6; 10; 4; 5] |> f even // expected [[2; 4]; [6; 10; 4]] This code does not seem to be readable that much. Also, I don't like lines (1) and (2). Is there any better solution?

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• Is it best to make fewer calls to the database and output the results in an array?

  - by Jonathan

  I'm trying to create a more succinct way to make hundreds of db calls. Instead of writing the whole query out every time I wanted to output a single field, I tried to port the code into a class that did all the query work. This is the class I have so far: class Listing { /* Connect to the database */ private $mysql; function __construct() { $this->mysql = new mysqli(DB_LOC, DB_USER, DB_PASS, DB) or die('Could not connect'); } function getListingInfo($l_id = "", $category = "", $subcategory = "", $username = "", $status = "active") { $condition = "`status` = '$status'"; if (!empty($l_id)) $condition .= "AND `L_ID` = '$l_id'"; if (!empty($category)) $condition .= "AND `category` = '$category'"; if (!empty($subcategory)) $condition .= "AND `subcategory` = '$subcategory'"; if (!empty($username)) $condition .= "AND `username` = '$username'"; $result = $this->mysql->query("SELECT * FROM listing WHERE $condition") or die('Error fetching values'); $info = $result->fetch_object() or die('Could not create object'); return $info; } } This makes it easy to access any info I want from a single row. $listing = new Listing; echo $listing->getListingInfo('','Books')->title; This outputs the title of the first listing in the category "Books". But if I want to output the price of that listing, I have to make another call to getListingInfo(). This makes another query on the db and again returns only the first row. This is much more succinct than writing the entire query each time, but I feel like I may be calling the db too often. Is there a better way to output the data from my class and still be succinct in accessing it (maybe outputting all the rows to an array and returning the array)? If yes, How?

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• Problems while trying to make a query with variables in the conditions (stored procedure)

  - by pablo89

  Hi!! Im having a problem, Im trying to do a query... I remember that in the past I did something like this but today this query is returning nothing, no error, no data, just nothing... the query is something like this: SELECT field1, @variableX:=field2 FROM table WHERE (SELECT COUNT(fieldA) FROM table2 WHERE fieldB=@variableX AND fieldC=0)0 AND (SELECT COUNT(fieldA) FROM table2 WHERE fieldB=@variableX AND fieldC=4)=0; I also tried this query but it didnt work (also it gaves no error): SELECT field1, @variableX:=field2, @variableY:=(SELECT COUNT(fieldA) FROM table2 WHERE fieldB=@variableX AND fieldC=0), @variableZ:=(SELECT COUNT(fieldA) FROM table2 WHERE fieldB=@variableX AND fieldC=4) FROM table WHERE @variableY0 AND @variableZ=0; As you can see, what Im trying to do in the 1st query is use a variable in the conditions; in the 2nd query Im trying to create some variables and evaluate them in the conditions. At the end in the 2nd query the @variableY=1 AND @variableZ=0 but I dont know what the query returns an empty data What could be wrong here??? Any comment or suggest is welcome!!! thanks!!! Bye!!!

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• Frequently getting booted from Securemote VPN-1 Connection

  - by Nick L.

  I connect to my office's network remotely through the Checkpoint SecuRemote E75 (R75) VPN application, but recently it's been causing me a lot of issues when connecting from home. I connect through a WRT54GL router running DD-WRT v24 firmware, so I have no clue if that affects anything. I took a dump of the logs for Checkpoint and here are the messages that populate when I get booted but I have no clue how to decipher them and my IT department is completely clueless in terms of resolving the situation. I'm thinking the router is blocking the keep alive connection or something along those lines, but I have no idea how to fix the problem. [ 2388 2932][30 Aug 22:47:49][TR_OFFICE_MODE] TR_OFFICE_MODE::TrOfficeMode::OmSendIpFrameCB: Not sending packet because it's not to the enc domain [ 2388 2932][30 Aug 22:47:50][TR_EVENTS] TR_EVENTS::Raise: Running registered cb... [ 2388 2932][30 Aug 22:47:50][TrComInf] TrComInf::TrComInfSendAsynchronic: __start__ 22:47:50.606 [ 2388 2932][30 Aug 22:47:50][TrComInf] TrComInf::TrComInf::TrComInfSendAsynchronic: Acquiring mutex [ 2388 2932][30 Aug 22:47:50][messaging] messaging::send_all: Sending Message {{ 2 }} , len 185 [ 2388 2932][30 Aug 22:47:50][tcpserver] TcpMultiPipe::pipe_if_send: Message (193 bytes) written successfully to socket 0x224 [ 2388 2932][30 Aug 22:47:50][TrComInf] TrComInf::TrComInf::TrComInfSendAsynchronic: Released mutex [ 2388 2932][30 Aug 22:47:50][TrComInf] TrComInf::TrComInfSendAsynchronic: __end__ 22:47:50.606. Total time - 0 milliseconds [ 2388 2932][30 Aug 22:47:50][TR_SRV2CL] TR_SRV2CL::SendNotification: Successfully sent notification of type TR_NOTIFICATION_TRAFFIC_IDLE [ 2388 2932][30 Aug 22:47:50][vna] vna_trap: received VNA_TRAP_FORWARD_PACKET [ 2388 2932][30 Aug 22:47:50][vna] vna_traffic_fwd_do : forwarding packet with 98 bytes [ 2388 2932][30 Aug 22:47:50][TR_OFFICE_MODE] TrOfficeMode::OmSendIpFrameCB: Packet to destination 192.168.162.15 of protocol 17 [ 2388 2932][30 Aug 22:47:50][TR_OFFICE_MODE] TR_OFFICE_MODE::TrOfficeMode::OmSendIpFrameCB: Not sending packet because it's not to the enc domain [ 2388 2932][30 Aug 22:47:51][vna] vna_trap: received VNA_TRAP_FORWARD_PACKET [ 2388 2932][30 Aug 22:47:51][vna] vna_traffic_fwd_do : forwarding packet with 98 bytes [ 2388 2932][30 Aug 22:47:51][TR_OFFICE_MODE] TrOfficeMode::OmSendIpFrameCB: Packet to destination 192.168.162.15 of protocol 17 [ 2388 2932][30 Aug 22:47:51][TR_OFFICE_MODE] TR_OFFICE_MODE::TrOfficeMode::OmSendIpFrameCB: Not sending packet because it's not to the enc domain [ 2388 2392][30 Aug 22:47:52][TracService] service_ctrl_ex: Called with ctrl_code 14 [ 2388 2392][30 Aug 22:47:52][TracService] service_ctrl_ex: System got SERVICE_CONTROL_SESSIONCHANGE message event type 4 session 2 [ 2388 2392][30 Aug 22:47:52][TracService] service_ctrl_ex: Console/remote disconnect has occured in session 2 [ 2388 2932][30 Aug 22:47:52][vna] vna_trap: received VNA_TRAP_FORWARD_PACKET [ 2388 2932][30 Aug 22:47:52][vna] vna_traffic_fwd_do : forwarding packet with 98 bytes [ 2388 2932][30 Aug 22:47:52][TR_OFFICE_MODE] TrOfficeMode::OmSendIpFrameCB: Packet to destination 192.168.162.15 of protocol 17 [ 2388 2932][30 Aug 22:47:52][TR_OFFICE_MODE] TR_OFFICE_MODE::TrOfficeMode::OmSendIpFrameCB: Not sending packet because it's not to the enc domain [ 2388 2932][30 Aug 22:47:52][TR_CONN_MANAGER] TR_CONN_MANAGER::ConnEnum: Returning connection at position 1 [ 2388 2932][30 Aug 22:47:52][TR_EVENTS] TR_EVENTS::Raise: Running registered cb... [ 2388 2932][30 Aug 22:47:52][TR_CONN_MANAGER] TR_CONN_MANAGER::ConnEventMainHandler: no gw handle [ 2388 2932][30 Aug 22:47:52][TR_CONN_MANAGER] TR_CONN_MANAGER::ConnEventMainHandler: Current connection state is TR_CONN_STATE_CONNECTED. Receiving event of type CONN_EVENT_SYSTEM_SESSION_LOGOFF. Connection handle = 1. System state: TR_SYSTEM_STATE_RUNNING [ 2388 2932][30 Aug 22:47:52][CONFIG_MANAGER] suspend_tunnel_while_locked return value false, because it is Default variable. Scope: site 12.43.159.10, gw NULL ,user USER [ 2388 2932][30 Aug 22:47:52][TR_CONN_MANAGER] TR_CONN_MANAGER::ConnEventConnectedHandler: no gw handle [ 2388 2932][30 Aug 22:47:52][TR_CONN_MANAGER] TR_CONN_MANAGER::ConnEventConnectedHandler: receive session logoff event while connected. cancelling connection Thanks all. :)

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• Cacti: "An internal Net-Snmp error condition detected in Cacti snmp_count"

  - by Recc

  There's the odd forum topic about an error similarly obscure as this, but I haven't seen any for snmp_count in particular. Also I don't see graphing problems, though I can't simply go and eyeball all graphs. However the poller does time out and has to be stopped by its internal process preventing overruns. If I filter out the flood of this error in the log I dont get anything else except the poller timeout: 06/12/2014 12:48:00 PM - POLLER: Poller[0] Maximum runtime of 58 seconds exceeded. Exiting. 06/12/2014 12:48:00 PM - SYSTEM STATS: Time:58.8566 Method:spine Processes:1 Threads:40 Hosts:1923 HostsPerProcess:1923 DataSources:61584 RRDsProcessed:0 06/12/2014 12:48:00 PM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal I saw in the running processes /usr/local/spine/spine 0 2053 that's always left behind. When I kill it the flooding of the error stops. Of course it's the same on the next poll run as it goes through the devices. 2053 is apparently the DB ID for a device. I deleted it completely to see if that stops it. It doesn't, instead 2052 is seen there. I suspect It'll be the same if I keep deleting devices which I will not do. This started happening midday when I wasn't doing anything to the cacti server. I have tried reducing Maximum Threads per Process to 1 and Number of PHP Script Servers to 1. I've been running it at 10 script servers / 40 threads for months with poll cycle time of about 20 sec. I just found out Running snmpwalk on any host would begin returning the values but then timeout halfway through. This doesn't happen from different servers on the network this Cacti is suggesting still that it's a problem with it locally. Any suggestions? For one polling cycle I changed to use cmd.php instead. then I started getting errors like CMDPHP: Poller[0] Host[45] DS[541] WARNING: Result from SNMP not valid. Partial Result: U Perhaps as expected. Looking closely I see that every snmpwalk I do is interrupted at the same place as if some byte limit is hit and the connection torn down.

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• Proxying webmin with nginx

  - by TheLQ

  I am attempting to proxy webmin behind nginx for various reasons that are outside the scope of this question. However I've been trying for a while now and can't seem to figure it out and think I'm to the point where I've exhausted all the permutations of the config file I can think of. What I have now: relevant nginx config (commented out options removed, I tried many) # Proxy for webmin location /admin/quackwall-webmin { proxy_pass http://127.0.0.1:10000; # Also tried ending with /admin/quackwall-webmin proxy_set_header Host $host; } /etc/webmin/config - Relevant parts webprefix=/admin/quackwall-webmin webprefixnoredir=1 referer=(nginx domain name) Webmin itself is on the standard ports, listening on all addresses temporarily for debugging. SSL has been disabled for right now. So I make a standard request for the login page. However all the CSS and images are broken, with the standard login page returned for all of the resources. In the webmin miniserv logs I see 127.0.0.1 - - [29/Oct/2012:12:29:00 -0400] "GET /admin/quackwall-webmin/session_login.cgi HTTP/1.0" 401 2453 127.0.0.1 - - [29/Oct/2012:12:29:01 -0400] "GET /admin/quackwall-webmin/unauthenticated/style.css HTTP/1.0" 401 2453 127.0.0.1 - - [29/Oct/2012:12:29:01 -0400] "GET /admin/quackwall-webmin/unauthenticated/sorttable.js HTTP/1.0" 401 2453 127.0.0.1 - - [29/Oct/2012:12:29:01 -0400] "GET /admin/quackwall-webmin/unauthenticated/toggleview.js HTTP/1.0" 401 2453 So all the URL's are returning 401s. Interestingly ngrep seems to show that the requests suceeded on the backend communication between nginx and webmin T 127.0.0.1:58908 -> 127.0.0.1:10000 [AP] POST /admin/quackwall-webmin/session_login.cgi HTTP/1.0..Host: (host)..Connection: close..User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW 64; rv:16.0) Gecko/20100101 Firefox/16.0..Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8..Accept-Language: en-US,en;q=0.5. .Accept-Encoding: gzip, deflate..Referer: http://(host)/admin/quackwall-webmin/session_login.cgi..Cookie: testing=1..Cache-Control: ma x-age=0..Content-Type: application/x-www-form-urlencoded..Content-Length: 41....page=%2F&user=(user)&pass=(pass) T 127.0.0.1:10000 -> 127.0.0.1:58908 [AP] HTTP/1.0 200 Document follows.. Various other permutations of these config options and others show similar results, with the URL sent to webmin by nginx either being /admin/quackwall-webmin/session_login.cgi, /admin/quackwall-webmin//session_login.cgi, and just /session_login.cgi. All give 201 Unauthenticated responses. All requests, even those that somewhat succeed (as in I can actually load the resources of the page) Is changing the webprefix in webmin even supported? What am I doing wrong? What else can I try?

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• Exchange server not serving mobile devices - how to troubleshoot?

  - by chickeninabiscuit

  Our exchange server has suddenly stopped serving mobile devices. Attempts to connect result in our ActiveSync server returning HTTP 500. It is serving outlook clients fine. Our server is Windows 2003 SBS 6.5 SP2 There are no abnormal events in the system log. I ran the "Exchange ActiveSync with AutoDiscover" at https://www.testexchangeconnectivity.com/ I've notice an abnormality in the exchange properties, Log File Directory shows: Access denied. Facility: Win32 ID no: 80070005 Exchange System Manager As shown in the following image: I think it may be related to a recent issue we had here: http://serverfault.com/questions/40222/windows-server-2003-suddenly-unable-to-connect-to-anything We followed a procedure to reinstall TCP/IP: http://support.microsoft.com/kb/325356 I've run the "exchange activesync" connectivity test at testexchangeconnectivity.com: Attempting to Resolve the host name mail.immersive.com.au in DNS. Host successfully Resolved Additional Details IP(s) returned: 221.133.203.229 Testing TCP Port 443 on host mail.immersive.com.au to ensure it is listening/open. The port was opened successfully. Testing SSL Certificate for validity. The certificate passed all validation requirements. Test Steps Validating certificate name Successfully validated the certificate name Additional Details Found hostname mail.immersive.com.au in Certificate Subject Common name Validating certificate trust for Windows Mobile Devices Certificate is trusted and all certificates are present in chain Additional Details Certificate is trusted for Windows Mobile 5 and Later platforms. Root = [email protected], CN=Thawte Server CA, OU=Certification Services Division, O=Thawte Consulting cc, L=Cape Town, S=Western Cape, C=ZA Testing certificate date to ensure validity Date Validation passed. The certificate is not expired. Additional Details Certificate is valid: NotBefore = 1/5/2009 4:00:00 PM, NotAfter = 1/11/2010 3:59:59 PM Testing Http Authentication Methods for URL https://mail.immersive.com.au/Microsoft-Server-Activesync/ Http Authentication Methods are correct Additional Details Found all expected authentication methods and no disallowed methods. Methods Found: Basic Attempting an Activesync session with server Errors were encountered while testing the ActiveSync session Test Steps Attempting to send OPTIONS command to server OPTIONS response was successfully received and is valid Additional Details Headers received: MicrosoftOfficeWebServer: 5.0_Pub Pragma: no-cache Public: OPTIONS, POST Allow: OPTIONS, POST MS-Server-ActiveSync: 6.5.7638.1 MS-ASProtocolVersions: 1.0,2.0,2.1,2.5 MS-ASProtocolCommands: Sync,SendMail,SmartForward,SmartReply,GetAttachment,GetHierarchy,CreateCollection,DeleteCollection,MoveCollection,FolderSync,FolderCreate,FolderDelete,FolderUpdate,MoveItems,GetItemEstimate,MeetingResponse,ResolveRecipients,ValidateCert,Provision,Search,Notify,Ping Content-Length: 0 Date: Thu, 16 Jul 2009 01:07:27 GMT Server: Microsoft-IIS/6.0 X-Powered-By: ASP.NET Attempting FolderSync command on ActiveSync session FolderSync command test failed Tell me more about this issue and how to resolve it Additional Details Exchange

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• Varnish configuration to only cache for non-logged in users

  - by davidsmalley

  I have a Ruby on Rails application fronted by varnish+nginx. As most of the sites content is static unless you are a logged in user, I want to cache the site heavily with varnish when a user is logged out but only to cache static assets when they are logged in. When a user is logged in they will have the cookie 'user_credentials' present in their Cookie: header, in addition I need to skip caching on /login and /sessions in order that a user can get their 'user_credentials' cookie in the first place. Rails by default does not set a cache friendly Cache-control header, but my application sets a "public,s-max-age=60" header when a user is not logged in. Nginx is set to return 'far future' expires headers for all static assets. The configuration I have at the moment is totally bypassing the cache for everything when logged in, including static assets — and is returning cache MISS for everything when logged out. I've spent hours going around in circles and here is my current default.vcl director rails_director round-robin { { .backend = { .host = "xxx.xxx.xxx.xxx"; .port = "http"; .probe = { .url = "/lbcheck/lbuptest"; .timeout = 0.3 s; .window = 8; .threshold = 3; } } } } sub vcl_recv { if (req.url ~ "^/login") { pipe; } if (req.url ~ "^/sessions") { pipe; } # The regex used here matches the standard rails cache buster urls # e.g. /images/an-image.png?1234567 if (req.url ~ "\.(css|js|jpg|jpeg|gif|ico|png)\??\d*$") { unset req.http.cookie; lookup; } else { if (req.http.cookie ~ "user_credentials") { pipe; } } # Only cache GET and HEAD requests if (req.request != "GET" && req.request != "HEAD") { pipe; } } sub vcl_fetch { if (req.url ~ "^/login") { pass; } if (req.url ~ "^/sessions") { pass; } if (req.http.cookie ~ "user_credentials") { pass; } else { unset req.http.Set-Cookie; } # cache CSS and JS files if (req.url ~ "\.(css|js|jpg|jpeg|gif|ico|png)\??\d*$") { unset req.http.Set-Cookie; } if (obj.status >=400 && obj.status <500) { error 404 "File not found"; } if (obj.status >=500 && obj.status <600) { error 503 "File is Temporarily Unavailable"; } } sub vcl_deliver { if (obj.hits > 0) { set resp.http.X-Cache = "HIT"; } else { set resp.http.X-Cache = "MISS"; } }

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• Nginx $scheme doesn't always work while using SSL for one specific page

  - by jjiceman

  I read and followed this question in order to configure nginx to force SSL for one page (admin.php for XenForo), and it is working well for a few of the site administrators but is not for myself. I was wondering if anyone has any advice on how to improve this configuration: ... ssl_certificate example.net.crt; ssl_certificate_key example.key; server { listen 80 default; listen 443 ssl; server_name www.example.net example.net; access_log /srv/www/example.net/logs/access.log; error_log /srv/www/example.net/logs/error.log; root /srv/www/example.net/public_html; index index.php index.html; location / { if ( $scheme = https ){ rewrite ^ http://example.net$request_uri? permanent; } try_files $uri $uri/ /index.php?$uri&$args; index index.php index.html; } location ^~ /admin.php { if ( $scheme = http ) { rewrite ^ https://example.net$request_uri? permanent; } try_files $uri /index.php; include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS on; } location ~ \.php$ { try_files $uri /index.php; include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS off; } } ... It seems that the extra information in the location ^~ /admin.php block is unecessary, does anyone know of an easy way to avoid duplicate code? Without it it skips the php block and just returns the php files. Currently it applies https correctly in Firefox when I navigate to admin.php. In Chrome, it downloads the admin.php page. When returning to the non-https website in Firefox, it does not correctly return to http but stays as SSL. Like I said earlier, this only happens for me, the other admins can go back and forth without a problem. Is this an issue on my end that I can fix? And does anyone know of any ways I could reduce duplicate configuration options in the configuration? Thanks in advance!

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• Permissions problems with Apache / SVN

  - by Fred Wuerges

  I am installed a SVN server (v1.6) on a VPS contracted with CentOS 5, Apache 2.2 with WHM panel. I installed and configured all necessary modules and am able to create and access repositories via my web browser normally. The problem: I can not commit or import anything, always return permission errors: First error: Can not open file '/var/www/svn/test/db/txn-current-lock': Permission denied After fix the previous error: Can't open '/var/www/svn/test/db/tempfile.tmp': Permission denied And other... (and happends many others) Can't open file '/var/www/svn/test/db/txn-protorevs/0-1m.rev': Permission denied I've read and executed permissions on numerous tutorials regarding this errors, all without success. I've defined the owner as apache or nobody and different permissions for folders and files. I'm using TortoiseSVN to connect to the server. Some information that may find useful: I'm trying to perform commit through an external HTTP connection, like: svn commit http://example.com/svn/test SELinux is disabled. sestatus returns SELinux status: disabled Running the command to see the active processes of Apache, some processes are left with user/group "nobody". I tried changing the settings of Apache to not run with that user/group, but all my websites stopped working, returning this error: Forbidden You don't have permission to access / on this server. Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request. Apache process list: root@vps [/var/www]# ps aux | egrep '(apache|httpd)' root 19904 0.0 4.4 133972 35056 ? Ss 16:58 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20401 0.0 3.5 133972 27772 ? S 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL root 20409 0.0 3.4 133972 27112 ? S 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20410 0.0 3.8 190040 30412 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20412 0.0 3.9 190344 30944 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20414 0.0 4.4 190160 35364 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20416 0.0 4.0 190980 32108 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20418 0.3 5.3 263028 42328 ? Sl 17:01 0:12 /usr/local/apache/bin/httpd -k start -DSSL root 32409 0.0 0.1 7212 816 pts/0 R+ 17:54 0:00 egrep (apache|httpd) SVN folder permission var/www/: drwxrwxr-x 3 apache apache 4096 Dec 11 16:41 svn/ Repository permission var/www/svn/: drwxrwxr-x 6 apache apache 4096 Dec 11 16:41 test/ Internal folders of repository var/www/svn/test: drwxrwxr-x 2 apache apache 4096 Dec 11 16:41 conf/ drwxrwxr-x 6 apache apache 4096 Dec 11 16:41 db/ -rwxrwxr-x 1 apache apache 2 Dec 11 16:41 format* drwxrwxr-x 2 apache apache 4096 Dec 11 16:41 hooks/ drwxrwxr-x 2 apache apache 4096 Dec 11 16:41 locks/ -rwxrwxr-x 1 apache apache 229 Dec 11 16:41 README.txt*

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• SSH_ORIGINAL_ENVIRONMENT error with snow leopard client to a gitosis server on debian

  - by Mica

  I have a server running gitosis (installed from the package manager) on debian lenny. I am able to perform all operations from my linux mint laptop, but from my Mac running an up-to-date Snow Leopard gives me the following error: mica@waste Desktop$ git clone [email protected]:Poems.git Initialized empty Git repository in /Users/micas/Desktop/Poems/.git/ ERROR:gitosis.serve.main:Repository read access denied fatal: The remote end hung up unexpectedly mica@waste Desktop$ ssh -v [email protected] OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009 debug1: Reading configuration data /etc/ssh_config debug1: Applying options for * debug1: Connecting to 192.168.0.156 [192.168.0.156] port 22. debug1: Connection established. debug1: identity file /Users/micas/.ssh/identity type -1 debug1: identity file /Users/micas/.ssh/id_rsa type 1 debug1: identity file /Users/micas/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5 debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host '192.168.0.156' is known and matches the RSA host key. debug1: Found key in /Users/mica/.ssh/known_hosts:5 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Offering public key: /Users/mica/.ssh/id_rsa debug1: Remote: Forced command: gitosis-serve mica@waste debug1: Remote: Port forwarding disabled. debug1: Remote: X11 forwarding disabled. debug1: Remote: Agent forwarding disabled. debug1: Remote: Pty allocation disabled. debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: Remote: Forced command: gitosis-serve micas@waste debug1: Remote: Port forwarding disabled. debug1: Remote: X11 forwarding disabled. debug1: Remote: Agent forwarding disabled. debug1: Remote: Pty allocation disabled. debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug1: Requesting [email protected] debug1: Entering interactive session. debug1: Requesting authentication agent forwarding. PTY allocation request failed on channel 0 ERROR:gitosis.serve.main:Need SSH_ORIGINAL_COMMAND in environment. debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: client_input_channel_req: channel 0 rtype [email protected] reply 0 debug1: channel 0: free: client-session, nchannels 1 Connection to 192.168.0.156 closed. Transferred: sent 2544, received 2888 bytes, in 0.1 seconds Bytes per second: sent 29642.1, received 33650.3 debug1: Exit status 1 Extensive googling of the error isn't returning much-- I changed the /etc/sshd_config file on my Mac as per http://www.schmidp.com/2009/06/23/enable-ssh-agent-key-forwarding-on-snow-leopard/. I still get the same error.

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• Perl missing while installing nginx on centos

  - by Ahoura Ghotbi

  I am trying to install nginx on my server, however it keeps returning "./configure: error: perl 5.6.1 or higher is required" eventhough I have perl v5.8.8!!!! I have already downloaded perl and trying to configure it using the following command : ./configure --with-http_stub_status_module --with-http_perl_module --with-http_flv_module --add-module=nginx_mod_h264_streaming here is the output : [root@fst nginx-0.8.55]# ./configure --with-http_stub_status_module --with-http_perl_module --with-http_flv_module --add-module=nginx_mod_h264_streaming checking for OS + Linux 2.6.18-308.el5 x86_64 checking for C compiler ... found + using GNU C compiler + gcc version: 4.1.2 20080704 (Red Hat 4.1.2-52) checking for gcc -pipe switch ... found checking for gcc builtin atomic operations ... found checking for C99 variadic macros ... found checking for gcc variadic macros ... found checking for unistd.h ... found checking for inttypes.h ... found checking for limits.h ... found checking for sys/filio.h ... not found checking for sys/param.h ... found checking for sys/mount.h ... found checking for sys/statvfs.h ... found checking for crypt.h ... found checking for Linux specific features checking for epoll ... found checking for sendfile() ... found checking for sendfile64() ... found checking for sys/prctl.h ... found checking for prctl(PR_SET_DUMPABLE) ... found checking for sched_setaffinity() ... found checking for crypt_r() ... found checking for sys/vfs.h ... found checking for nobody group ... found checking for poll() ... found checking for /dev/poll ... not found checking for kqueue ... not found checking for crypt() ... not found checking for crypt() in libcrypt ... found checking for F_READAHEAD ... not found checking for posix_fadvise() ... found checking for O_DIRECT ... found checking for F_NOCACHE ... not found checking for directio() ... not found checking for statfs() ... found checking for statvfs() ... found checking for dlopen() ... not found checking for dlopen() in libdl ... found checking for sched_yield() ... found checking for SO_SETFIB ... not found configuring additional modules adding module in nginx_mod_h264_streaming + ngx_http_h264_streaming_module was configured checking for PCRE library ... found checking for system md library ... not found checking for system md5 library ... not found checking for OpenSSL md5 crypto library ... found checking for zlib library ... found checking for perl + perl version: v5.8.8 built for x86_64-linux-thread-multi ./configure: error: perl 5.6.1 or higher is required

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• CakePHP in a subdirectory using nginx (Rewrite rules?)

  - by lhnz

  I managed to get this to work a while back, but on returning to the cakephp project I had started it seems that whatever changes I've made to nginx recently (or perhaps a recent update) have broken my rewrite rules. Currently I have: worker_processes 1; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 80; server_name localhost; location / { root html; index index.php index.html index.htm; } location /basic_cake/ { index index.php; if (-f $request_filename) { break; } if (!-f $request_filename) { rewrite ^/basic_cake/(.+)$ /basic_cake/index.php?url=$1 last; break; } } location /cake_test/ { index index.php; if (-f $request_filename) { break; } if (!-f $request_filename) { rewrite ^/cake_test/(.+)$ /cake_test/index.php?url=$1 last; break; } } # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 # location ~ \.php$ { root html; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } } server { listen 8081; server_name localhost; root /srv/http/html/xsp; location / { index index.html index.htm index.aspx default.aspx; } location ~ \.(aspx|asmx|ashx|asax|ascx|soap|rem|axd|cs|config|dll)$ { fastcgi_pass 127.0.0.1:9001; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } } } The problem that I have is that the css and images will not load from the webroot. Instead if I visit http://localhost/basic_cake/css/cake.generic.css, I get a page which tells me: CakePHP: the rapid development php framework Missing Controller Error: CssController could not be found. Error: Create the class CssController below in file: app/controllers/css_controller.php var $name = 'Css'; } ? Notice: If you want to customize this error message, create app/views/errors/missing_controller.ctp CakePHP: the rapid development php framework Does anybody have any ideas on how to fix this?

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• UPS vs Solar Power in case of power failure for a server [on hold]

  - by Zen 8000k

  I am looking for a low power, low end pc able to run 24/7 without overheating and a way to support it in case of power failure. Power failures can be up to 72 hours. The pc dosen't need a monitor or keyboard. A modem must also be protected in case of power failure. When i say low end, i don't mean crap. The cpu needs to be x86 and have at least 1k cpu in this chart: http://www.cpubenchmark.net/index.php What's the best way to do this? EDIT: more info. I need to run a home server. The server will perform light tasks mainly. A x86 cpu sadly is the only route for my use. I want to be able to run the server and the router/modem in case of power failure. Now, regarding how long the power will fail: 1) 1 hours is OK for most situations. (say 90%) 2) 3 hours is OK (say 98%) 3) 6 hours is more thank OK. (say 99.5%) 4) On extreme cases the power might fail days. I believe this is very unlikely to happen. More is great but, really, how ofter power will fail more than 3 hours? I believe once every year at best. Well, that's too rare to care about. Given the above, I am looking for a cost effective way to archive 1-3 hour power or 6 hour if possible. Solutions: You guys give me great ideas. 1) Power generator: no good as power will fail for 10 seconds before returning. Also I read online, "clean" power generators cost 1.5k+, so it's out of budged. Non clean generator might damage electronics, right? 2) Solar power: i don't know for sure about this. Sounds like a great idea, too good to be true, honestly. For only 200$ i get 100+w? What are the drawbacks here? 3) UPS: This seems to be the best. The only problem is the cost. Cost < 200$ = great 400$ = budged limit

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