What the heck is with the site?
#1
Original Poster

Joined: Dec 2003
Posts: 24,359
Likes: 0
What the heck is with the site?
Today I've been having a lot of trouble getting posts to come up--I get the page background but nothing else. And I can't access my own posts. Is anyone else having this problem or is it just another IE update?
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#8
Joined: Jun 2004
Posts: 19,000
Likes: 0
Notice that it's the construction of the index in the left-hand column that takes forever, not displaying an individual thread.
The server script searches the file that contains the thread headers for all the forums in a sequential fashion, scanning for the forum or member or search string wanted. It's like looking for an encyclopedia article in a book whose topics aren't in alphabetical order.
But once it finds the index item for a thread, it has the exact location and can therefore retrieve an individual thread very quickly. That's why that operation is so fast.
But when several people have all requested an index build, the system trips over itself constantly, and the efficiency of each search is compromised.
The solution is to keep the indexes in a linked list rather than a sequential file. This is a type of data organization wherein each file record contains a "pointer" to the next record in the related series. For example, thread 345 points to thread 397 points to 428 and so on, which saves the process time required to go through all the records that don't meet the criteria being scanned for.
At American Airlines, I worked in the group responsible for wringing every last millisecond of performance out of the Sabre processor. We could access any PNR (passenger itinerary) in about 1/10 of a second. If the PNR had been accessed recently, it took hundredths or thousandths of a second.
The server script searches the file that contains the thread headers for all the forums in a sequential fashion, scanning for the forum or member or search string wanted. It's like looking for an encyclopedia article in a book whose topics aren't in alphabetical order.
But once it finds the index item for a thread, it has the exact location and can therefore retrieve an individual thread very quickly. That's why that operation is so fast.
But when several people have all requested an index build, the system trips over itself constantly, and the efficiency of each search is compromised.
The solution is to keep the indexes in a linked list rather than a sequential file. This is a type of data organization wherein each file record contains a "pointer" to the next record in the related series. For example, thread 345 points to thread 397 points to 428 and so on, which saves the process time required to go through all the records that don't meet the criteria being scanned for.
At American Airlines, I worked in the group responsible for wringing every last millisecond of performance out of the Sabre processor. We could access any PNR (passenger itinerary) in about 1/10 of a second. If the PNR had been accessed recently, it took hundredths or thousandths of a second.
#9
Joined: Sep 2004
Posts: 45,322
Likes: 0
Hello Underhill, our editor Katie wrote to me and said that the glitches were due to the fact that Fodor's is upgrading the website which they hope to have completed by fall. Not a technical explaination as Robes gave of course. I sure hope the problems do not continue on until fall. Everyone has had problems but it seems from all the various threads started lately Fodorite's have had different problems which is strange. Anyway Underhill just know it is not your computer. Actually today I personally haven't had any problems with Fodor's website but obviously you have. And I know that Robes knows what he is talking about but I don't, lol. Oh to have that type of technical experience.
#11
Joined: Jun 2007
Posts: 1,622
Likes: 0
I have not chimed in about access troubles, but reading the threads on this topic it occurs to me that Fodors should worry about what I done .. just go away when the site does not work. I have had the troubles mentioned in various threads .. only background shows .. have to sign-in over and over .. for I do not remember how long, certainly over the summer.
For me, I return, lol!
For a new visitor .. those are the viewers, or rather, trying to become viewers who are much more important, and not people you want to lose before getting them addicted to Fodors
For me, I return, lol!
For a new visitor .. those are the viewers, or rather, trying to become viewers who are much more important, and not people you want to lose before getting them addicted to Fodors

#13
Joined: Jan 2008
Posts: 1,126
Likes: 0
Robespierre - you're not serious are you? I mean about linked lists being the way to speed up building the list in the left hand column?
I thought linked lists went out of fashion about 20 years ago with the ubiquity of RDMS. Why not just maintain the required indexes real time? date/major heading. User/date.
I thought linked lists went out of fashion about 20 years ago with the ubiquity of RDMS. Why not just maintain the required indexes real time? date/major heading. User/date.
#15
Joined: Nov 2004
Posts: 16,518
Likes: 0
Yesterday when I requested "Europe" threads, the first 50 posts were about Barcelona - from 1997 to 2000. I waited about 10 mins, then it worked OK. Very frustrating.
When I click on my name, it take forever or never, and usually I end up closing the browser & starting over again.
Earlier in the week I spent about 20 mins responding to a thread. When I hit "post" it asked me to log in (which I should not have had to do), then it lost my reply.
Pretty sloppy design & stress testing, if you ask me. I have been posting less because I don't have time to "copy" my posts in case Fodors looses it, log off/on the browser, go do some chores between selecting a "country" and then getting the threads displayed, etc. We just got back from a 6 week vacation in Europe, and this did not happen before we left.
Stu Dudley
When I click on my name, it take forever or never, and usually I end up closing the browser & starting over again.
Earlier in the week I spent about 20 mins responding to a thread. When I hit "post" it asked me to log in (which I should not have had to do), then it lost my reply.
Pretty sloppy design & stress testing, if you ask me. I have been posting less because I don't have time to "copy" my posts in case Fodors looses it, log off/on the browser, go do some chores between selecting a "country" and then getting the threads displayed, etc. We just got back from a 6 week vacation in Europe, and this did not happen before we left.
Stu Dudley
#16
Joined: Jun 2004
Posts: 19,000
Likes: 0
<i>Author: afterall
Date: 08/17/2008, 06:48 am
Robespierre - you're not serious are you? I mean about linked lists being the way to speed up building the list in the left hand column?</i>
That's precisely my point. Linked lists eliminate the "building" altogether. Even with RDBMS, it is necessary to scan the index.
If Sabre ran on SQL, it would collapse in a heap within seconds.
Date: 08/17/2008, 06:48 am
Robespierre - you're not serious are you? I mean about linked lists being the way to speed up building the list in the left hand column?</i>
That's precisely my point. Linked lists eliminate the "building" altogether. Even with RDBMS, it is necessary to scan the index.
If Sabre ran on SQL, it would collapse in a heap within seconds.
#17
Joined: Feb 2003
Posts: 1,327
Likes: 0
Same problems for me as Stu, it is very frustating to write a response and them have them ask you to register and loose the post!
I thought it was my computer acting up when the left side didn't show up, I blame the comperter for everything, I'll have to apologize.
I thought it was my computer acting up when the left side didn't show up, I blame the comperter for everything, I'll have to apologize.
#18
Joined: Jan 2003
Posts: 98,221
Likes: 12
Right-o above about new posters getting discouraged. No other travel forum I post on has the same technical problems, like Fodor's does over the past few weeks or longer. People who are not already hooked, possibly wouldn't stick around.
#19
Joined: Oct 2003
Posts: 57,886
Likes: 0
I've been having this problem for weeks. You get the frame of the pages but none of the content. I don;t know if it's because they're attaching too many interactive ads that delay other content loading or what.
But it happens on both my Mac at home and PCs elsewhere - and with different browsers (IE, Safari or Firefox - latest versions of each).
But it happens on both my Mac at home and PCs elsewhere - and with different browsers (IE, Safari or Firefox - latest versions of each).
#20
Joined: Jun 2004
Posts: 19,000
Likes: 0
I don't get any interactive ads, and the index column still bogs down. There's a bottleneck in the database software which is aggravated by the number of users trying to access it simultaneously. I'm sure the Fodor's team knows what to look for.



