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Search: Posts Made By: Ian W
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Forum: Passengers & SLF (Self Loading Freight)
9th Jun 2017, 09:34
Replies: 634
Views: 303,310
Posted By Ian W

If you know that your system 1. has just...

If you know that your system
1. has just passed one of the indicators that it needs replacement that were declared at its installation. With say system hardware or software becoming unsupported in...
Forum: Passengers & SLF (Self Loading Freight)
8th Jun 2017, 13:48
Replies: 634
Views: 303,310
Posted By Ian W

This is the way it always happens. The actual...

This is the way it always happens.
The actual failure (finger trouble) should have had no effect. BUT
The failover data centre was too small, possibly from inception or because nobody had thought...
Forum: Passengers & SLF (Self Loading Freight)
6th Jun 2017, 15:38
Replies: 634
Views: 303,310
Posted By Ian W

But there are geographically separate data...

But there are geographically separate data centers backing each other up - or so we are told. But this is obviously not the case. It would appear that what they have really been operating with is a...
Forum: Passengers & SLF (Self Loading Freight)
6th Jun 2017, 10:44
Replies: 634
Views: 303,310
Posted By Ian W

From that article: This is an admission that...

From that article:
This is an admission that the BA system was not designed as a fault tolerant system. It should not be possible to fail a distributed fault tolerant system by failing one data...
Forum: Passengers & SLF (Self Loading Freight)
5th Jun 2017, 09:12
Replies: 634
Views: 303,310
Posted By Ian W

I presume you mean the Spanish government? After...

I presume you mean the Spanish government? After all BA is just a subsidiary of a Spanish company now and is even run by a Spaniard. This is the reason that there is only interest in money that can...
Forum: Passengers & SLF (Self Loading Freight)
4th Jun 2017, 09:19
Replies: 634
Views: 303,310
Posted By Ian W

It does start to look as if Virgin Atlantic could...

It does start to look as if Virgin Atlantic could outlive BA.
Forum: Passengers & SLF (Self Loading Freight)
3rd Jun 2017, 17:58
Replies: 634
Views: 303,310
Posted By Ian W

In large commercial systems UPS's are banks of...

In large commercial systems UPS's are banks of batteries that the systems always run off. External or backup generator power trickle charges the batteries. There is no 'changeover' as far as the...
Forum: Passengers & SLF (Self Loading Freight)
2nd Jun 2017, 12:43
Replies: 634
Views: 303,310
Posted By Ian W

Unfortunately, it is all too true. Someone...

Unfortunately, it is all too true.
Someone will have already done a back of an envelope risk analysis and reckoned the cost of changing employment practice/organization/systems exceeds the...
Forum: Passengers & SLF (Self Loading Freight)
2nd Jun 2017, 12:29
Replies: 634
Views: 303,310
Posted By Ian W

I have to agree with this. It should not be...

I have to agree with this. It should not be possible to 'take down' a complete distributed system by crashing one subsystem however 'dirty' the crash was and whatever the process being run was. The...
Forum: Passengers & SLF (Self Loading Freight)
2nd Jun 2017, 09:40
Replies: 634
Views: 303,310
Posted By Ian W

I have no doubt that point has already been made...

I have no doubt that point has already been made by the IAG bean counters.

However, another failure like this one and people will vote with their wallets (as much as the IAG monopoly at LHR...
Forum: Passengers & SLF (Self Loading Freight)
31st May 2017, 22:34
Replies: 634
Views: 303,310
Posted By Ian W

This is one of the problems. PR says give...

This is one of the problems.

PR says give the punters an excuse that sounds good and won't affect pax or share prices.

Sensible organization management says: find out the truth so we don't...
Forum: Passengers & SLF (Self Loading Freight)
31st May 2017, 13:12
Replies: 634
Views: 303,310
Posted By Ian W

The problem is often not hardware or software but...

The problem is often not hardware or software but 'wetware' as the human element is sometimes called. Or to put it another way - "Nothing is fool proof as fools are too ingenious".

Somewhere I...
Forum: Passengers & SLF (Self Loading Freight)
31st May 2017, 11:26
Replies: 634
Views: 303,310
Posted By Ian W

The 'power surge' excuse worked - it convinced...

The 'power surge' excuse worked - it convinced the engineering illiterate CEO and he passed it onto the media who have even less engineering knowledge.
We will find out eventually what caused the...
Forum: Passengers & SLF (Self Loading Freight)
30th May 2017, 20:27
Replies: 634
Views: 303,310
Posted By Ian W

In a machine room from my past, that no longer...

In a machine room from my past, that no longer exists, a security guard groped for the light switch and powered down the research data center using the emergency switch despite its switch cover -...
Forum: Passengers & SLF (Self Loading Freight)
30th May 2017, 16:01
Replies: 634
Views: 303,310
Posted By Ian W

Similarly: A modern aircraft is an IT project...

Similarly: A modern aircraft is an IT project with engines and wings.
Forum: Passengers & SLF (Self Loading Freight)
30th May 2017, 11:53
Replies: 634
Views: 303,310
Posted By Ian W

On the contrary take BA to the small claims court...

On the contrary take BA to the small claims court if you are not covered by insurance. I would think that the claim could be uncontested. If everyone affected from UK were to go to their small...
Forum: Passengers & SLF (Self Loading Freight)
30th May 2017, 10:11
Replies: 634
Views: 303,310
Posted By Ian W

Yes in theory subsystems should be loosely...

Yes in theory subsystems should be loosely coupled so that a domino effect is avoided. However, it is obviously not the case in BA (actually IAG) systems as was demonstrated by this event. ...
Forum: Passengers & SLF (Self Loading Freight)
29th May 2017, 15:59
Replies: 634
Views: 303,310
Posted By Ian W

Many of the major systems I have dealt with run...

Many of the major systems I have dealt with run on batteries all the time. The choice is which system: grid, standby grid, standby generators to trickle charge the batteries.
Forum: Passengers & SLF (Self Loading Freight)
29th May 2017, 15:52
Replies: 634
Views: 303,310
Posted By Ian W

This kind of crash after outsourcing and losing...

This kind of crash after outsourcing and losing experienced staff has happened before. You would think that CEOs would learn from other's disasters but apparently not. :ugh:


It was precisely...
Forum: Passengers & SLF (Self Loading Freight)
29th May 2017, 13:02
Replies: 634
Views: 303,310
Posted By Ian W

It is starting to look like WW bet with R Branson...

It is starting to look like WW bet with R Branson could have been the other way around. Virgin still going strong and not been swallowed by Delta. I do hope payment of the bet will be publicized.
...
Forum: Passengers & SLF (Self Loading Freight)
28th May 2017, 20:50
Replies: 634
Views: 303,310
Posted By Ian W

It is an open and shut case. Airline system was...

It is an open and shut case. Airline system was not resilient to power failure and resulted in complete shut down at major hubs in UK. No other airline had problems therefore the issue was unique to...
Forum: Passengers & SLF (Self Loading Freight)
28th May 2017, 16:56
Replies: 634
Views: 303,310
Posted By Ian W

It is not.

It is not.
Forum: Passengers & SLF (Self Loading Freight)
28th May 2017, 16:53
Replies: 634
Views: 303,310
Posted By Ian W

Even IFF you can find someone still capable of...

Even IFF you can find someone still capable of manual load sheets, manual check in (and luggage accounting) and physically counting SLF and checking their manually written boarding passes; It is...
Forum: Passengers & SLF (Self Loading Freight)
28th May 2017, 10:39
Replies: 634
Views: 303,310
Posted By Ian W

The solution to this is to dump all the input...

The solution to this is to dump all the input messages at a failover and restart from a checkpoint a few seconds before the crash. Normally, most problems are some kind of timing issue and restart...
Forum: Passengers & SLF (Self Loading Freight)
28th May 2017, 10:28
Replies: 634
Views: 303,310
Posted By Ian W

Interesting, I proposed a similar system to Delta...

Interesting, I proposed a similar system to Delta after the ATL system lost it and all gates were full with arrivals being put into penalty boxes. My proposal was to use one or more of the gates...
Forum: Passengers & SLF (Self Loading Freight)
28th May 2017, 00:56
Replies: 634
Views: 303,310
Posted By Ian W

Redundant -- more systems than is needed to run...

Redundant -- more systems than is needed to run the operational service

Mirrored -- Systems that have full (mirrored) copies of one or more other systems

I see no contradiction. Perhaps some...
Forum: Passengers & SLF (Self Loading Freight)
27th May 2017, 21:11
Replies: 634
Views: 303,310
Posted By Ian W

I can remember a 7 day 24 hrs a day test cycle...

I can remember a 7 day 24 hrs a day test cycle where we were running the system under load then going in and deleting primary then backup processes and confirming that the system kept running, then...
Forum: Passengers & SLF (Self Loading Freight)
27th May 2017, 18:56
Replies: 634
Views: 303,310
Posted By Ian W

I shall translate: "He says it is all down...

I shall translate:

"He says it is all down to a power supply failure."

really means:

We designed the system so that one power supply failing would bring down our entire operations worldwide....
Forum: Passengers & SLF (Self Loading Freight)
27th May 2017, 18:43
Replies: 634
Views: 303,310
Posted By Ian W

I think we are both right. It is cheaper to...

I think we are both right.
It is cheaper to use IT 'professionals' who have only ever seen Java and its variants and they are then forced to try to work with legacy systems written in one of the...
Forum: Passengers & SLF (Self Loading Freight)
27th May 2017, 16:51
Replies: 634
Views: 303,310
Posted By Ian W

What this, and other recent failures at other...

What this, and other recent failures at other airlines, shows is a lack of professionalism in their IT departments. It is completely possible to build redundant, reliable, completely fault tolerant...
Forum: Passengers & SLF (Self Loading Freight)
27th May 2017, 13:47
Replies: 634
Views: 303,310
Posted By Ian W

The person who 'saved the airline a fortune in IT...

The person who 'saved the airline a fortune in IT costs' has now cost the airline a fortune in operational costs and loss of reputation. I would hope they have now saved the airline more money by...
Showing results 1 to 31 of 31


 
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