Twitter celebrates fifth birthday with infrastructure overhaul

Company says the switch will improve the site's performance and uptime

Twitter has wrapped up a major overhaul of its IT infrastructure designed to dramatically enhance the microblogging service’s uptime, performance and availability.

After a series of lengthy and disruptive outages last summer, Twitter embarked on a revamping of its systems in September, a project that has now been finished, the company said on Monday.

The overhaul amounted to Twitter’s “most significant engineering challenge” and is expected to have a significantly positive impact, ensuring that the company can “stay abreast of our capacity needs; give users and developers greater reliability; and, allow for new product offerings,” the blog posting reads.

 

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If the infrastructure upgrade meets its expectations, it will be a major improvement for Twitter, whose system infrastructure has routinely struggled to keep up with the site’s meteoric user growth.

In addition to improving its service to end users and to external developers, Twitter is also helping its efforts to boost ad revenue. Twitter, which is celebrating its fifth birthday this week, launched its Promoted Tweets advertising program almost a year ago with the expectation that it will allow the company to sustain its business with revenue that is proportional to its massive popularity.

Last week, the company said that while it took more than three years for users to send the first 1 billion “tweets,” that now happens every week. Moreover, the average number of Twitter messages sent per day has increased from 50 million in March 2010 to 140 million this month. An average of 460,000 Twitter accounts are created every day, while the number of Twitter mobile users has spiked 182% year-on-year.

Among the main improvements Twitter implemented are the ability to replicate user posts to multiple data centers – about 20Tb worth of data – as well as the creation of tools and processes to better monitor its systems, including servers and networking equipment.

“With hardware at a second data center in place, we moved some of our non-runtime systems there – giving us headroom to stay ahead of tweet growth. This second data center also served as a staging laboratory for our replication and migration strategies. Simultaneously, we prepped a third larger data center as our final nesting ground,” Monday’s post read.

Adding to the complexity was that the makeover had to remain transparent to end users and not impact the service, even while usage climbed, and that a number of unrelated new products and features were launched during this time.

“This move gives us the capacity to deliver Tweets with greater reliability and speed, and creates more runway to focus on the most interesting operations and engineering problems.”

You can follow TechCentral on twitter: @techcentral_ie

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'string') { return '+1 000 000 0000'; // Default US placeholder } var mockPlaceholders = [ { countryCode: 'US', placeholder: '+1 000 000 0000', helpText: 'Include the US country code +1 before the phone number', }, { countryCode: 'GB', placeholder: '+44 0000 000000', helpText: 'Include the GB country code +44 before the phone number', }, { countryCode: 'CA', placeholder: '+1 000 000 0000', helpText: 'Include the CA country code +1 before the phone number', }, { countryCode: 'AU', placeholder: '+61 000 000 000', helpText: 'Include the AU country code +61 before the phone number', }, { countryCode: 'DE', placeholder: '+49 000 0000000', helpText: 'Fügen Sie vor der Telefonnummer die DE-Ländervorwahl +49 ein', }, { countryCode: 'FR', placeholder: '+33 0 00 00 00 00', helpText: 'Incluez le code pays FR +33 avant le numéro de téléphone', }, { countryCode: 'ES', placeholder: '+34 000 000 000', helpText: 'Incluya el código de país ES +34 antes del número de teléfono', }, { countryCode: 'NL', placeholder: '+31 0 00000000', helpText: 'Voeg de NL-landcode +31 toe vóór het telefoonnummer', }, { countryCode: 'BE', placeholder: '+32 000 00 00 00', helpText: 'Incluez le code pays BE +32 avant le numéro de téléphone', }, { countryCode: 'CH', placeholder: '+41 00 000 00 00', helpText: 'Fügen Sie vor der Telefonnummer die CH-Ländervorwahl +41 ein', }, { countryCode: 'AT', placeholder: '+43 000 000 0000', helpText: 'Fügen Sie vor der Telefonnummer die AT-Ländervorwahl +43 ein', }, { countryCode: 'IE', placeholder: '+353 00 000 0000', helpText: 'Include the IE country code +353 before the phone number', }, { countryCode: 'IT', placeholder: '+39 000 000 0000', helpText: 'Includere il prefisso internazionale IT +39 prima del numero di telefono', }, { countryCode: 'NO', placeholder: '+47 000 00 000', helpText: 'Inkluder NO landskode +47 før telefonnummeret', }, { countryCode: 'SE', placeholder: '+46 00 000 00 00', helpText: 'Inkludera SE landskod +46 före telefonnumret', }, { countryCode: 'DK', placeholder: '+45 00 00 00 00', helpText: 'Inkluder DK landekode +45 før telefonnummeret', }, { countryCode: 'FI', placeholder: '+358 00 000 0000', helpText: 'Sisällytä FI-maakoodi +358 ennen puhelinnumeroa', }, { countryCode: 'EE', placeholder: '+372 0000 0000', helpText: 'Lisage EE riigikood +372 telefoninumbri ette', }, { countryCode: 'PL', placeholder: '+48 000 000 000', helpText: 'Podaj numer kierunkowy PL +48 przed numerem telefonu', }, { countryCode: 'SK', placeholder: '+421 000 000 000', helpText: 'Pred telefónne číslo uveďte kód krajiny SK +421', }, { countryCode: 'LV', placeholder: '+371 0000 0000', helpText: 'Iekļaujiet LV valsts kodu +371 pirms tālruņa numura', }, { countryCode: 'LT', placeholder: '+370 0000 0000', helpText: 'Įtraukite LT šalies kodą +370 prieš telefono numerį', }, { countryCode: 'GR', placeholder: '+30 000 000 0000', helpText: 'Συμπεριλάβετε τον κωδικό χώρας GR +30 πριν από τον αριθμό τηλεφώνου', }, { countryCode: 'PT', placeholder: '+351 000 000 000', helpText: 'Inclua o código de país PT +351 antes do número de telefone', }, { countryCode: 'HR', placeholder: '+385 00 000 0000', helpText: 'Uključite HR pozivni broj države +385 prije telefonskog broja', }, { countryCode: 'SI', placeholder: '+386 00 000 000', helpText: 'Vključite SI kodo države +386 pred telefonsko številko', }, { countryCode: 'IS', placeholder: '+354 000 0000', helpText: 'Láttu IS landsnúmer +354 fylgja á undan símanúmerinu', }, { countryCode: 'LU', placeholder: '+352 000 000 000', helpText: 'Incluez le code pays LU +352 avant le numéro de téléphone', }, { countryCode: 'MC', placeholder: '+377 00 00 00 00', helpText: 'Incluez le code pays MC +377 avant le numéro de téléphone', }, { countryCode: 'AD', placeholder: '+376 000 000', helpText: 'Incloeu el codi de país AD +376 abans del número de telèfon', }, { countryCode: 'JE', placeholder: '+44 0000 000000', helpText: 'Include the JE country code +44 before the phone number', }, { countryCode: 'IM', placeholder: '+44 0000 000000', helpText: 'Include the IM country code +44 before the phone number', }, { countryCode: 'GG', placeholder: '+44 0000 000000', helpText: 'Include the GG country code +44 before the phone number', }, { countryCode: 'AL', placeholder: '+355 00 000 0000', helpText: 'Përfshini kodin e vendit AL +355 para numrit të telefonit', }, { countryCode: 'SM', placeholder: '+378 0000 000000', helpText: 'Includere il prefisso internazionale SM +378 prima del numero di telefono', }, { countryCode: 'FO', placeholder: '+298 000000', helpText: 'Inkluder FO landekode +298 før telefonnummeret', }, { countryCode: 'MT', placeholder: '+356 0000 0000', helpText: 'Include the MT country code +356 before the phone number', }, { countryCode: 'LI', placeholder: '+423 000 0000', helpText: 'Fügen Sie vor der Telefonnummer die LI-Ländervorwahl +423 ein', }, { countryCode: 'GI', placeholder: '+350 000 00000', helpText: 'Include the GI country code +350 before the phone number', }, { countryCode: 'MD', placeholder: '+373 00 000 000', helpText: 'Includeți codul de țară MD +373 înaintea numărului de telefon', }, { countryCode: 'HU', placeholder: '+36 00 000 0000', helpText: 'A telefonszám előtt adja meg a HU országkódot +36', }, { countryCode: 'NZ', placeholder: '+64 00 000 0000', helpText: 'Include the NZ country code +64 before the phone number', }, { countryCode: 'ME', placeholder: '+382 00 000 000', helpText: 'Uključite ME pozivni broj države +382 prije telefonskog broja', }, ]; const selectedPlaceholder = mockPlaceholders.find(function(item) { return item && item.countryCode === countryCode; }); return selectedPlaceholder ? selectedPlaceholder.placeholder : mockPlaceholders[0].placeholder; } function updatePlaceholder(countryCode, fieldName) { if (!countryCode || !fieldName) { return; } const phoneInput = document.querySelector('#mce-' + fieldName); if (!phoneInput) { return; } const placeholder = getDefaultPlaceholder(countryCode); if (placeholder) { phoneInput.placeholder = placeholder; } } function updateCountryCodeInstruction(countryCode, fieldName) { updatePlaceholder(countryCode, fieldName); } function getDefaultHelpText(countryCode) { var mockPlaceholders = [ { countryCode: 'US', placeholder: '+1 000 000 0000', helpText: 'Include the US country code +1 before the phone number', }, { countryCode: 'GB', placeholder: '+44 0000 000000', helpText: 'Include the GB country code +44 before the phone number', }, { countryCode: 'CA', placeholder: '+1 000 000 0000', helpText: 'Include the CA country code +1 before the phone number', }, { countryCode: 'AU', placeholder: '+61 000 000 000', helpText: 'Include the AU country code +61 before the phone number', }, { countryCode: 'DE', placeholder: '+49 000 0000000', helpText: 'Fügen Sie vor der Telefonnummer die DE-Ländervorwahl +49 ein', }, { countryCode: 'FR', placeholder: '+33 0 00 00 00 00', helpText: 'Incluez le code pays FR +33 avant le numéro de téléphone', }, { countryCode: 'ES', placeholder: '+34 000 000 000', helpText: 'Incluya el código de país ES +34 antes del número de teléfono', }, { countryCode: 'NL', placeholder: '+31 0 00000000', helpText: 'Voeg de NL-landcode +31 toe vóór het telefoonnummer', }, { countryCode: 'BE', placeholder: '+32 000 00 00 00', helpText: 'Incluez le code pays BE +32 avant le numéro de téléphone', }, { countryCode: 'CH', placeholder: '+41 00 000 00 00', helpText: 'Fügen Sie vor der Telefonnummer die CH-Ländervorwahl +41 ein', }, { countryCode: 'AT', placeholder: '+43 000 000 0000', helpText: 'Fügen Sie vor der Telefonnummer die AT-Ländervorwahl +43 ein', }, { countryCode: 'IE', placeholder: '+353 00 000 0000', helpText: 'Include the IE country code +353 before the phone number', }, { countryCode: 'IT', placeholder: '+39 000 000 0000', helpText: 'Includere il prefisso internazionale IT +39 prima del numero di telefono', }, { countryCode: 'NO', placeholder: '+47 000 00 000', helpText: 'Inkluder NO landskode +47 før telefonnummeret', }, { countryCode: 'SE', placeholder: '+46 00 000 00 00', helpText: 'Inkludera SE landskod +46 före telefonnumret', }, { countryCode: 'DK', placeholder: '+45 00 00 00 00', helpText: 'Inkluder DK landekode +45 før telefonnummeret', }, { countryCode: 'FI', placeholder: '+358 00 000 0000', helpText: 'Sisällytä FI-maakoodi +358 ennen puhelinnumeroa', }, { countryCode: 'EE', placeholder: '+372 0000 0000', helpText: 'Lisage EE riigikood +372 telefoninumbri ette', }, { countryCode: 'PL', placeholder: '+48 000 000 000', helpText: 'Podaj numer kierunkowy PL +48 przed numerem telefonu', }, { countryCode: 'SK', placeholder: '+421 000 000 000', helpText: 'Pred telefónne číslo uveďte kód krajiny SK +421', }, { countryCode: 'LV', placeholder: '+371 0000 0000', helpText: 'Iekļaujiet LV valsts kodu +371 pirms tālruņa numura', }, { countryCode: 'LT', placeholder: '+370 0000 0000', helpText: 'Įtraukite LT šalies kodą +370 prieš telefono numerį', }, { countryCode: 'GR', placeholder: '+30 000 000 0000', helpText: 'Συμπεριλάβετε τον κωδικό χώρας GR +30 πριν από τον αριθμό τηλεφώνου', }, { countryCode: 'PT', placeholder: '+351 000 000 000', helpText: 'Inclua o código de país PT +351 antes do número de telefone', }, { countryCode: 'HR', placeholder: '+385 00 000 0000', helpText: 'Uključite HR pozivni broj države +385 prije telefonskog broja', }, { countryCode: 'SI', placeholder: '+386 00 000 000', helpText: 'Vključite SI kodo države +386 pred telefonsko številko', }, { countryCode: 'IS', placeholder: '+354 000 0000', helpText: 'Láttu IS landsnúmer +354 fylgja á undan símanúmerinu', }, { countryCode: 'LU', placeholder: '+352 000 000 000', helpText: 'Incluez le code pays LU +352 avant le numéro de téléphone', }, { countryCode: 'MC', placeholder: '+377 00 00 00 00', helpText: 'Incluez le code pays MC +377 avant le numéro de téléphone', }, { countryCode: 'AD', placeholder: '+376 000 000', helpText: 'Incloeu el codi de país AD +376 abans del número de telèfon', }, { countryCode: 'JE', placeholder: '+44 0000 000000', helpText: 'Include the JE country code +44 before the phone number', }, { countryCode: 'IM', placeholder: '+44 0000 000000', helpText: 'Include the IM country code +44 before the phone number', }, { countryCode: 'GG', placeholder: '+44 0000 000000', helpText: 'Include the GG country code +44 before the phone number', }, { countryCode: 'AL', placeholder: '+355 00 000 0000', helpText: 'Përfshini kodin e vendit AL +355 para numrit të telefonit', }, { countryCode: 'SM', placeholder: '+378 0000 000000', helpText: 'Includere il prefisso internazionale SM +378 prima del numero di telefono', }, { countryCode: 'FO', placeholder: '+298 000000', helpText: 'Inkluder FO landekode +298 før telefonnummeret', }, { countryCode: 'MT', placeholder: '+356 0000 0000', helpText: 'Include the MT country code +356 before the phone number', }, { countryCode: 'LI', placeholder: '+423 000 0000', helpText: 'Fügen Sie vor der Telefonnummer die LI-Ländervorwahl +423 ein', }, { countryCode: 'GI', placeholder: '+350 000 00000', helpText: 'Include the GI country code +350 before the phone number', }, { countryCode: 'MD', placeholder: '+373 00 000 000', helpText: 'Includeți codul de țară MD +373 înaintea numărului de telefon', }, { countryCode: 'HU', placeholder: '+36 00 000 0000', helpText: 'A telefonszám előtt adja meg a HU országkódot +36', }, { countryCode: 'NZ', placeholder: '+64 00 000 0000', helpText: 'Include the NZ country code +64 before the phone number', }, { countryCode: 'ME', placeholder: '+382 00 000 000', helpText: 'Uključite ME pozivni broj države +382 prije telefonskog broja', }, ]; if (!countryCode || typeof countryCode !== 'string') { return mockPlaceholders[0].helpText; } const selectedHelpText = mockPlaceholders.find(function(item) { return item && item.countryCode === countryCode; }); return selectedHelpText ? selectedHelpText.helpText : mockPlaceholders[0].helpText; } function setDefaultHelpText(countryCode) { const helpTextSpan = document.querySelector('#help-text'); if (!helpTextSpan) { return; } } function updateHelpTextCountryCode(countryCode, fieldName) { if (!countryCode || !fieldName) { return; } setDefaultHelpText(countryCode); } function initializeSmsPhoneDropdown(fieldName) { if (!fieldName || typeof fieldName !== 'string') { return; } const dropdown = document.querySelector('#country-select-' + fieldName); const displayFlag = document.querySelector('#flag-display-' + fieldName); if (!dropdown || !displayFlag) { return; } const smsPhoneData = window.MC?.smsPhoneData; if (smsPhoneData && smsPhoneData.programs && Array.isArray(smsPhoneData.programs)) { dropdown.innerHTML = generateDropdownOptions(smsPhoneData.programs); } const defaultProgram = getDefaultCountryProgram(smsPhoneData?.defaultCountryCode, smsPhoneData?.programs); if (defaultProgram && defaultProgram.countryCode) { dropdown.value = defaultProgram.countryCode; const flagSpan = displayFlag?.querySelector('#flag-emoji-' + fieldName); if 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: false; var shouldAppendCountryCode = smsNotRequiredRemoveCountryCodeEnabled ? isRequired : true; var phoneInput = document.querySelector('#mce-' + fieldName); if (phoneInput && defaultProgram.countryCallingCode && shouldAppendCountryCode) { phoneInput.value = defaultProgram.countryCallingCode; } displayFlag?.addEventListener('click', function(e) { dropdown.focus(); }); dropdown?.addEventListener('change', function() { const selectedCountry = this.value; if (!selectedCountry || typeof selectedCountry !== 'string') { return; } const flagSpan = displayFlag?.querySelector('#flag-emoji-' + fieldName); if (flagSpan) { flagSpan.textContent = getCountryUnicodeFlag(selectedCountry); flagSpan.setAttribute('aria-label', sanitizeHtml(selectedCountry) + ' flag'); } const selectedProgram = window.MC?.smsPhoneData?.programs.find(function(program) { return program && program.countryCode === selectedCountry; }); var smsNotRequiredRemoveCountryCodeEnabled = true; var smsField = Object.values({"EMAIL":{"name":"EMAIL","label":"Email Address","helper_text":"","type":"email","required":true,"audience_field_name":"Email Address","merge_id":0,"help_text_enabled":false,"enabled":true,"order":0,"field_type":"merge"},"FNAME":{"name":"FNAME","label":"First Name","helper_text":"","type":"text","required":false,"audience_field_name":"First Name","enabled":false,"order":null,"field_type":"merge","merge_id":1},"MMERGE2":{"name":"MMERGE2","label":"Second Name","helper_text":"","type":"text","required":false,"audience_field_name":"Second Name","enabled":false,"order":null,"field_type":"merge","merge_id":2},"MMERGE3":{"name":"MMERGE3","label":"Company Name","helper_text":"","type":"text","required":false,"audience_field_name":"Company Name","enabled":false,"order":null,"field_type":"merge","merge_id":3},"MMERGE4":{"name":"MMERGE4","label":"Job Title","helper_text":"","type":"text","required":false,"audience_field_name":"Job Title","enabled":false,"order":null,"field_type":"merge","merge_id":4},"SIGNUP":{"name":"SIGNUP","label":"Signup form location","helper_text":"","type":"text","required":false,"audience_field_name":"Signup form location","enabled":false,"order":null,"field_type":"merge","merge_id":5},"MMERGE6":{"name":"MMERGE6","label":"Image URL","helper_text":"","type":"imageurl","required":false,"audience_field_name":"Image URL","enabled":false,"order":null,"field_type":"merge","merge_id":6}}).find(function(f) { return f.name === fieldName && f.type === 'smsphone'; }); var isRequired = smsField ? smsField.required : false; var shouldAppendCountryCode = smsNotRequiredRemoveCountryCodeEnabled ? isRequired : true; var phoneInput = document.querySelector('#mce-' + fieldName); if (phoneInput && selectedProgram.countryCallingCode && shouldAppendCountryCode) { phoneInput.value = selectedProgram.countryCallingCode; } updateSmsLegalText(selectedCountry, fieldName); updatePlaceholder(selectedCountry, fieldName); updateCountryCodeInstruction(selectedCountry, fieldName); }); } document.addEventListener('DOMContentLoaded', function() { const smsPhoneFields = document.querySelectorAll('[id^="country-select-"]'); smsPhoneFields.forEach(function(dropdown) { const fieldName = dropdown?.id.replace('country-select-', ''); initializeSmsPhoneDropdown(fieldName); }); });

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