Last week I wrote about the Lupe failure of basic registers, which occurred Tuesday, March 25 at no

Last week I wrote about the Lupe failure of basic registers, which occurred Tuesday, March 25 at noon. At the same time, I focused mainly on the availability of information on the actual power (as it first appeared on the website of the Ministry of Interior and Administration of the very basic registers to here then disappeared again) quoted a response from the management of the basic registers (to my question about the failure), and wondered the fact that as important as the basic system registers the classic "single point of failure", when the failure of one location (the data center the last of us of the State Printing the last of us Works of Securities) ceases to function and have a few hours to spare to move location (datacenter Czech Post).
It says that: On 25 3rd 2014 at 11:42 o'clock in the data center of the State Printing Works of Securities on fire and subsequent emergency the last of us disconnection of electricity from technologies basic registries (ZR). Managing Basic registers (SZR) immediately conducted an evaluation of the operational incident and the relaunch of the service ZR was instructed to move processing services ZR to the secondary data center. Moving processing was carried out before the time limit of 4 hours, which is defined in the emergency plan of the ZR ZR and architecture. The operation went smoothly mainly due to regular testing of emergency procedures performed SZR.
According to unofficial information system of basic registers really does not have the HA (High Availability) cluster, within which there would be active (hot) backup, which in the case of failure of one locality immediately took over the provision of services so that the whole system worked without any failure . Such a solution would supposedly for basic registers have been too expensive. the last of us Instead, they have to be kept in the backup location backups of individual databases, and continually reflected only the requirements for each database operation. Therefore, when the failure of the main locations should be in the backup location first to execute these (here pending) database operations, and thus get a local copy of the database in the same state as they were in the main area just before the failure - so that they could continue to provide services entire system. And it is those four hours.
Article on site management of the basic registers also talks about that: to restore traffic on 25 3rd at 15:36 pm Despite emergency disconnection of electricity from technology ZR avoid loss of data processed and ZR are able to continuously provide reference data according to authorized users.
To do this, I would like to remind the last of us its own testing described in the previous article: from 15:52 still do not receive the listings in the basic registers, data requested by mail (through the so-called form agendový information the last of us system FAIS). By the way, this particular agendový Information System (FAIS) had another outage on March 28, when he appeared on the web SZR following information (now unavailable again) is currently partly limited drawdown data formulářovým agendovým information system. To restore the last of us full functionality to work. Statistics operation of basic registers
In conclusion, I still say that the management of key registers on their website recently launched the statistics on the number the last of us of transactions the last of us carried out basic registers. It shows the total number of transactions for the last six days, calculated for each individual hour. See the following figure.
Today, we have this chart does not describe the last of us the situation of 25 March 2014, when the described failure. Older graph that includes the last of us blackout periods, but can still be found in the Google cache, as shown below. the last of us
If you but stops, like me, that this chart does not see that four-hour outage, then you should the last of us know that this is due to the omission of entire hourly intervals just at the material the last of us time. Nicely it is shown in the following code, looking directly into the entire chart: after 11 o'clock 03.25 followed by 16 pm the same day, and then just 8 am the next day.
Today Martin Vyleťal
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